[409] | 1 | /********************************************************************* |
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| 2 | * Copyright 2010, UCAR/Unidata |
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| 3 | * See netcdf/COPYRIGHT file for copying and redistribution conditions. |
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| 4 | * $Header$ |
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| 5 | *********************************************************************/ |
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| 6 | |
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| 7 | #include "config.h" |
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| 8 | |
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| 9 | #include <stdlib.h> |
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| 10 | #include <string.h> |
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| 11 | #include <stdio.h> |
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| 12 | |
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| 13 | #include "oc.h" |
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| 14 | #include "ocuri.h" |
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| 15 | |
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| 16 | #define OCURIDEBUG |
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| 17 | |
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| 18 | #define LBRACKET '[' |
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| 19 | #define RBRACKET ']' |
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| 20 | |
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| 21 | #ifndef FIX |
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| 22 | #define FIX(s) ((s)==NULL?"":(s)) |
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| 23 | #endif |
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| 24 | |
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| 25 | #ifndef NILLEN |
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| 26 | #define NILLEN(s) ((s)==NULL?0:strlen(s)) |
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| 27 | #endif |
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| 28 | |
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| 29 | #ifdef HAVE_STRDUP |
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| 30 | # ifndef nulldup |
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| 31 | # define nulldup(s) ((s)==NULL?NULL:strdup(s)) |
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| 32 | # endif |
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| 33 | #endif |
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| 34 | |
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| 35 | #ifndef HAVE_STRDUP |
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| 36 | static char* nulldup(char* s) |
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| 37 | { |
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| 38 | char* dup = NULL; |
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| 39 | if(s != NULL) { |
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| 40 | dup = (char*)malloc(strlen(s)+1); |
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| 41 | if(dup != NULL) |
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| 42 | strcpy(dup,s); |
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| 43 | } |
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| 44 | return dup; |
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| 45 | } |
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| 46 | #endif |
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| 47 | |
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| 48 | #ifdef OCIGNORE |
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| 49 | /* Not all systems have strndup, so provide one*/ |
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| 50 | static char* |
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| 51 | ocstrndup(const char* s, size_t len) |
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| 52 | { |
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| 53 | char* dup; |
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| 54 | if(s == NULL) return NULL; |
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| 55 | dup = (char*)ocmalloc(len+1); |
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| 56 | MEMCHECK(dup,NULL); |
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| 57 | memcpy((void*)dup,s,len); |
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| 58 | dup[len] = '\0'; |
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| 59 | return dup; |
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| 60 | } |
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| 61 | #endif |
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| 62 | |
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| 63 | /* Do not trust strncmp */ |
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| 64 | static int |
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| 65 | ocuristrncmp(const char* s1, const char* s2, size_t len) |
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| 66 | { |
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| 67 | const char *p,*q; |
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| 68 | if(s1 == s2) return 0; |
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| 69 | if(s1 == NULL) return -1; |
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| 70 | if(s2 == NULL) return +1; |
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| 71 | for(p=s1,q=s2;len > 0;p++,q++,len--) { |
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| 72 | if(*p != *q) |
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| 73 | return (*p - *q); |
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| 74 | if(*p == 0) return 0; /* *p == *q == 0 */ |
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| 75 | } |
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| 76 | /* 1st len chars are same */ |
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| 77 | return 0; |
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| 78 | } |
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| 79 | |
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| 80 | static char* legalprotocols[] = { |
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| 81 | "file:", |
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| 82 | "http:", |
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| 83 | "https:", |
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| 84 | "ftp:", |
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| 85 | NULL /* NULL terminate*/ |
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| 86 | }; |
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| 87 | |
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| 88 | /* Allowable character sets for encode */ |
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| 89 | static char* fileallow = |
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| 90 | "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!#$&'()*+,-./:;=?@_~"; |
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| 91 | |
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| 92 | static char* queryallow = |
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| 93 | "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!#$&'()*+,-./:;=?@_~"; |
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| 94 | |
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| 95 | static void ocparamfree(char** params); |
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| 96 | static int ocfind(char** params, const char* key); |
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| 97 | |
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| 98 | /* Do a simple uri parse: return 0 if fail, 1 otherwise*/ |
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| 99 | int |
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| 100 | ocuriparse(const char* uri0, OCURI** ocurip) |
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| 101 | { |
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| 102 | OCURI* ocuri = NULL; |
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| 103 | char* uri; |
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| 104 | char** pp; |
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| 105 | char* p; |
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| 106 | char* p1; |
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| 107 | int c; |
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| 108 | |
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| 109 | /* accumulate parse points*/ |
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| 110 | char* protocol = NULL; |
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| 111 | char* params = NULL; |
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| 112 | char* host = NULL; |
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| 113 | char* port = NULL; |
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| 114 | char* constraint = NULL; |
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| 115 | char* user = NULL; |
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| 116 | char* pwd = NULL; |
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| 117 | char* file = NULL; |
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| 118 | |
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| 119 | if(uri0 == NULL) |
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| 120 | return OC_EBADURL; |
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| 121 | |
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| 122 | ocuri = (OCURI*)calloc(1,sizeof(OCURI)); |
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| 123 | if(ocuri == NULL) return 0; |
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| 124 | |
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| 125 | /* make local copy of uri */ |
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| 126 | uri = nulldup(uri0); |
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| 127 | |
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| 128 | /* remove all whitespace*/ |
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| 129 | p = uri; |
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| 130 | p1 = uri; |
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| 131 | while((c=*p1++)) {if(c != ' ' && c != '\t') *p++ = c;} |
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| 132 | |
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| 133 | p = uri; |
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| 134 | |
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| 135 | /* break up the uri string into pieces*/ |
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| 136 | |
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| 137 | /* 1. leading bracketed parameters */ |
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| 138 | if(*p == LBRACKET) { |
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| 139 | params = p+1; |
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| 140 | /* find end of the clientparams*/ |
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| 141 | for(;*p;p++) {if(p[0] == RBRACKET && p[1] != LBRACKET) break;} |
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| 142 | if(*p == 0) goto fail; /* malformed client params*/ |
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| 143 | *p = '\0'; /* leave off the trailing rbracket for now */ |
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| 144 | p++; /* move past the params*/ |
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| 145 | } |
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| 146 | |
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| 147 | /* verify that the uri starts with an acceptable protocol*/ |
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| 148 | for(pp=legalprotocols;*pp;pp++) { |
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| 149 | if(ocuristrncmp(p,*pp,strlen(*pp))==0) break; |
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| 150 | } |
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| 151 | if(*pp == NULL) goto fail; /* illegal protocol*/ |
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| 152 | /* save the protocol */ |
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| 153 | protocol = *pp; |
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| 154 | |
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| 155 | /* 4. skip protocol */ |
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| 156 | p += strlen(protocol); |
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| 157 | |
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| 158 | /* 5. skip // */ |
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| 159 | if(*p != '/' && *(p+1) != '/') |
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| 160 | goto fail; |
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| 161 | p += 2; |
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| 162 | |
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| 163 | /* 6. Mark the end of the host section */ |
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| 164 | file = strchr(p,'/'); |
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| 165 | if(file) { |
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| 166 | *file++ = '\0'; /* warning: we just overwrote the leading / */ |
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| 167 | } else |
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| 168 | goto fail; |
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| 169 | |
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| 170 | /* 7. extract any user:pwd */ |
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| 171 | p1 = strchr(p,'@'); |
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| 172 | if(p1) {/* Assume we have user:pwd@ */ |
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| 173 | *p1 = '\0'; |
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| 174 | user = p; |
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| 175 | pwd = strchr(p,':'); |
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| 176 | if(!pwd) goto fail; /* malformed */ |
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| 177 | *pwd++ = '\0'; |
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| 178 | p = pwd+strlen(pwd)+1; |
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| 179 | } |
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| 180 | |
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| 181 | /* 8. extract host and port */ |
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| 182 | host = p; |
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| 183 | port = strchr(p,':'); |
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| 184 | if(port) { |
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| 185 | *port++ = '\0'; |
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| 186 | } |
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| 187 | |
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| 188 | /* 9. Look for '?' */ |
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| 189 | constraint = strchr(file,'?'); |
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| 190 | if(constraint) { |
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| 191 | *constraint++ = '\0'; |
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| 192 | } |
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| 193 | |
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| 194 | /* assemble the component pieces*/ |
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| 195 | if(uri0 && strlen(uri0) > 0) |
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| 196 | ocuri->uri = nulldup(uri0); |
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| 197 | if(protocol && strlen(protocol) > 0) { |
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| 198 | ocuri->protocol = nulldup(protocol); |
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| 199 | /* remove trailing ':' */ |
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| 200 | ocuri->protocol[strlen(protocol)-1] = '\0'; |
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| 201 | } |
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| 202 | if(user && strlen(user) > 0) |
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| 203 | ocuri->user = nulldup(user); |
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| 204 | if(pwd && strlen(pwd) > 0) |
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| 205 | ocuri->password = nulldup(pwd); |
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| 206 | if(host && strlen(host) > 0) |
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| 207 | ocuri->host = nulldup(host); |
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| 208 | if(port && strlen(port) > 0) |
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| 209 | ocuri->port = nulldup(port); |
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| 210 | if(file && strlen(file) > 0) { |
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| 211 | /* Add back the leading / */ |
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| 212 | ocuri->file = malloc(strlen(file)+2); |
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| 213 | strcpy(ocuri->file,"/"); |
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| 214 | strcat(ocuri->file,file); |
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| 215 | } |
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| 216 | if(constraint && strlen(constraint) > 0) |
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| 217 | ocuri->constraint = nulldup(constraint); |
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| 218 | ocurisetconstraints(ocuri,constraint); |
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| 219 | if(params != NULL && strlen(params) > 0) { |
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| 220 | ocuri->params = (char*)malloc(1+2+strlen(params)); |
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| 221 | strcpy(ocuri->params,"["); |
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| 222 | strcat(ocuri->params,params); |
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| 223 | strcat(ocuri->params,"]"); |
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| 224 | } |
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| 225 | |
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| 226 | #ifdef OCXDEBUG |
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| 227 | { |
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| 228 | fprintf(stderr,"ocuri:"); |
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| 229 | fprintf(stderr," params=|%s|",FIX(ocuri->params)); |
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| 230 | fprintf(stderr," protocol=|%s|",FIX(ocuri->protocol)); |
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| 231 | fprintf(stderr," host=|%s|",FIX(ocuri->host)); |
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| 232 | fprintf(stderr," port=|%s|",FIX(ocuri->port)); |
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| 233 | fprintf(stderr," file=|%s|",FIX(ocuri->file)); |
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| 234 | fprintf(stderr," constraint=|%s|",FIX(ocuri->constraint)); |
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| 235 | fprintf(stderr,"\n"); |
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| 236 | } |
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| 237 | #endif |
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| 238 | free(uri); |
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| 239 | if(ocurip != NULL) *ocurip = ocuri; |
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| 240 | return 1; |
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| 241 | |
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| 242 | fail: |
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| 243 | if(ocuri) ocurifree(ocuri); |
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| 244 | if(uri != NULL) free(uri); |
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| 245 | return 0; |
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| 246 | } |
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| 247 | |
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| 248 | void |
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| 249 | ocurifree(OCURI* ocuri) |
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| 250 | { |
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| 251 | if(ocuri == NULL) return; |
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| 252 | if(ocuri->uri != NULL) {free(ocuri->uri);} |
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| 253 | if(ocuri->protocol != NULL) {free(ocuri->protocol);} |
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| 254 | if(ocuri->user != NULL) {free(ocuri->user);} |
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| 255 | if(ocuri->password != NULL) {free(ocuri->password);} |
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| 256 | if(ocuri->host != NULL) {free(ocuri->host);} |
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| 257 | if(ocuri->port != NULL) {free(ocuri->port);} |
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| 258 | if(ocuri->file != NULL) {free(ocuri->file);} |
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| 259 | if(ocuri->constraint != NULL) {free(ocuri->constraint);} |
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| 260 | if(ocuri->projection != NULL) {free(ocuri->projection);} |
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| 261 | if(ocuri->selection != NULL) {free(ocuri->selection);} |
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| 262 | if(ocuri->params != NULL) {free(ocuri->params);} |
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| 263 | if(ocuri->paramlist != NULL) ocparamfree(ocuri->paramlist); |
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| 264 | free(ocuri); |
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| 265 | } |
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| 266 | |
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| 267 | /* Replace the constraints */ |
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| 268 | void |
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| 269 | ocurisetconstraints(OCURI* duri,const char* constraints) |
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| 270 | { |
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| 271 | char* proj = NULL; |
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| 272 | char* select = NULL; |
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| 273 | const char* p; |
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| 274 | |
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| 275 | if(duri->constraint == NULL) free(duri->constraint); |
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| 276 | if(duri->projection != NULL) free(duri->projection); |
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| 277 | if(duri->selection != NULL) free(duri->selection); |
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| 278 | duri->constraint = NULL; |
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| 279 | duri->projection = NULL; |
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| 280 | duri->selection = NULL; |
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| 281 | |
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| 282 | if(constraints == NULL || strlen(constraints)==0) return; |
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| 283 | |
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| 284 | duri->constraint = nulldup(constraints); |
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| 285 | if(*duri->constraint == '?') |
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| 286 | strcpy(duri->constraint,duri->constraint+1); |
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| 287 | |
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| 288 | p = duri->constraint; |
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| 289 | proj = (char*) p; |
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| 290 | select = strchr(proj,'&'); |
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| 291 | if(select != NULL) { |
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| 292 | size_t plen = (select - proj); |
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| 293 | if(plen == 0) { |
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| 294 | proj = NULL; |
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| 295 | } else { |
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| 296 | proj = (char*)malloc(plen+1); |
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| 297 | memcpy((void*)proj,p,plen); |
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| 298 | proj[plen] = '\0'; |
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| 299 | } |
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| 300 | select = nulldup(select); |
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| 301 | } else { |
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| 302 | proj = nulldup(proj); |
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| 303 | select = NULL; |
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| 304 | } |
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| 305 | duri->projection = proj; |
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| 306 | duri->selection = select; |
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| 307 | } |
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| 308 | |
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| 309 | |
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| 310 | /* Construct a complete OC URI without the client params |
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| 311 | and optionally with the constraints; |
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| 312 | caller frees returned string. |
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| 313 | Optionally encode the pieces. |
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| 314 | */ |
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| 315 | |
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| 316 | char* |
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| 317 | ocuribuild(OCURI* duri, const char* prefix, const char* suffix, int flags) |
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| 318 | { |
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| 319 | size_t len = 0; |
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| 320 | char* newuri; |
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| 321 | char* tmpfile; |
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| 322 | char* tmpsuffix; |
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| 323 | char* tmpquery; |
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| 324 | |
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| 325 | int withparams = ((flags&OCURIPARAMS) |
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| 326 | && duri->params != NULL); |
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| 327 | int withuserpwd = ((flags&OCURIUSERPWD) |
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| 328 | && duri->user != NULL && duri->password != NULL); |
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| 329 | int withconstraints = ((flags&OCURICONSTRAINTS) |
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| 330 | && duri->constraint != NULL); |
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| 331 | #ifdef NEWESCAPE |
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| 332 | int encode = (flags&OCURIENCODE); |
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| 333 | #else |
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| 334 | int encode = 0; |
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| 335 | #endif |
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| 336 | |
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| 337 | if(prefix != NULL) len += NILLEN(prefix); |
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| 338 | if(withparams) { |
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| 339 | len += NILLEN("[]"); |
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| 340 | len += NILLEN(duri->params); |
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| 341 | } |
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| 342 | len += (NILLEN(duri->protocol)+NILLEN("://")); |
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| 343 | if(withuserpwd) { |
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| 344 | len += (NILLEN(duri->user)+NILLEN(duri->password)+NILLEN(":@")); |
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| 345 | } |
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| 346 | len += (NILLEN(duri->host)); |
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| 347 | if(duri->port != NULL) { |
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| 348 | len += (NILLEN(":")+NILLEN(duri->port)); |
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| 349 | } |
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| 350 | |
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| 351 | tmpfile = duri->file; |
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| 352 | if(encode) |
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| 353 | tmpfile = ocuriencode(tmpfile,fileallow); |
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| 354 | len += (NILLEN(tmpfile)); |
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| 355 | |
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| 356 | if(suffix != NULL) { |
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| 357 | tmpsuffix = (char*)suffix; |
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| 358 | if(encode) |
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| 359 | tmpsuffix = ocuriencode(tmpsuffix,fileallow); |
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| 360 | len += (NILLEN(tmpsuffix)); |
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| 361 | } |
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| 362 | |
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| 363 | if(withconstraints) { |
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| 364 | tmpquery = duri->constraint; |
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| 365 | if(encode) |
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| 366 | tmpquery = ocuriencode(tmpquery,queryallow); |
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| 367 | len += (NILLEN("?")+NILLEN(tmpquery)); |
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| 368 | } |
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| 369 | |
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| 370 | len += 1; /* null terminator */ |
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| 371 | |
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| 372 | newuri = (char*)malloc(len); |
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| 373 | if(newuri == NULL) return NULL; |
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| 374 | |
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| 375 | newuri[0] = '\0'; |
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| 376 | if(prefix != NULL) strcat(newuri,prefix); |
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| 377 | if(withparams) { |
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| 378 | strcat(newuri,"["); |
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| 379 | strcat(newuri,duri->params); |
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| 380 | strcat(newuri,"]"); |
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| 381 | } |
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| 382 | if(duri->protocol != NULL) |
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| 383 | strcat(newuri,duri->protocol); |
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| 384 | strcat(newuri,"://"); |
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| 385 | if(withuserpwd) { |
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| 386 | strcat(newuri,duri->user); |
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| 387 | strcat(newuri,":"); |
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| 388 | strcat(newuri,duri->password); |
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| 389 | strcat(newuri,"@"); |
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| 390 | } |
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| 391 | if(duri->host != NULL) { /* may be null if using file: protocol */ |
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| 392 | strcat(newuri,duri->host); |
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| 393 | } |
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| 394 | if(duri->port != NULL) { |
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| 395 | strcat(newuri,":"); |
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| 396 | strcat(newuri,duri->port); |
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| 397 | } |
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| 398 | |
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| 399 | strcat(newuri,tmpfile); |
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| 400 | if(suffix != NULL) strcat(newuri,tmpsuffix); |
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| 401 | if(withconstraints) { |
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| 402 | strcat(newuri,"?"); |
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| 403 | strcat(newuri,tmpquery); |
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| 404 | } |
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| 405 | return newuri; |
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| 406 | } |
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| 407 | |
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| 408 | /**************************************************/ |
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| 409 | /* Parameter support */ |
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| 410 | |
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| 411 | /* |
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| 412 | Client parameters are assumed to be |
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| 413 | one or more instances of bracketed pairs: |
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| 414 | e.g "[...][...]...". |
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| 415 | The bracket content in turn is assumed to be a |
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| 416 | comma separated list of <name>=<value> pairs. |
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| 417 | e.g. x=y,z=,a=b. |
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| 418 | If the same parameter is specifed more than once, |
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| 419 | then the first occurrence is used; this is so that |
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| 420 | is possible to forcibly override user specified |
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| 421 | parameters by prefixing. |
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| 422 | IMPORTANT: client parameter string is assumed to |
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| 423 | have blanks compress out. |
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| 424 | Returns 1 if parse suceeded, 0 otherwise; |
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| 425 | */ |
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| 426 | |
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| 427 | int |
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| 428 | ocuridecodeparams(OCURI* ocuri) |
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| 429 | { |
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| 430 | char* cp; |
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| 431 | char* cq; |
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| 432 | int c; |
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| 433 | int i; |
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| 434 | int nparams; |
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| 435 | char* params0; |
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| 436 | char* params; |
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| 437 | char* params1; |
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| 438 | char** plist; |
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| 439 | |
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| 440 | if(ocuri == NULL) return 0; |
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| 441 | if(ocuri->params == NULL) return 1; |
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| 442 | |
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| 443 | params0 = ocuri->params; |
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| 444 | |
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| 445 | /* Pass 1 to replace beginning '[' and ending ']' */ |
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| 446 | if(params0[0] == '[') |
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| 447 | params = nulldup(params0+1); |
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| 448 | else |
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| 449 | params = nulldup(params0); |
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| 450 | |
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| 451 | if(params[strlen(params)-1] == ']') |
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| 452 | params[strlen(params)-1] = '\0'; |
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| 453 | |
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| 454 | /* Pass 2 to replace "][" pairs with ','*/ |
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| 455 | params1 = nulldup(params); |
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| 456 | cp=params; cq = params1; |
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| 457 | while((c=*cp++)) { |
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| 458 | if(c == RBRACKET && *cp == LBRACKET) {cp++; c = ',';} |
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| 459 | *cq++ = c; |
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| 460 | } |
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| 461 | *cq = '\0'; |
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| 462 | free(params); |
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| 463 | params = params1; |
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| 464 | |
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| 465 | /* Pass 3 to break string into pieces and count # of pairs */ |
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| 466 | nparams=0; |
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| 467 | for(cp=params;(c=*cp);cp++) { |
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| 468 | if(c == ',') {*cp = '\0'; nparams++;} |
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| 469 | } |
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| 470 | nparams++; /* for last one */ |
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| 471 | |
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| 472 | /* plist is an env style list */ |
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| 473 | plist = (char**)calloc(1,sizeof(char*)*(2*nparams+1)); /* +1 for null termination */ |
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| 474 | |
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| 475 | /* Pass 4 to break up each pass into a (name,value) pair*/ |
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| 476 | /* and insert into the param list */ |
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| 477 | /* parameters of the form name name= are converted to name=""*/ |
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| 478 | cp = params; |
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| 479 | for(i=0;i<nparams;i++) { |
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| 480 | char* next = cp+strlen(cp)+1; /* save ptr to next pair*/ |
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| 481 | char* vp; |
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| 482 | /*break up the ith param*/ |
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| 483 | vp = strchr(cp,'='); |
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| 484 | if(vp != NULL) {*vp = '\0'; vp++;} else {vp = "";} |
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| 485 | plist[2*i] = nulldup(cp); |
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| 486 | plist[2*i+1] = nulldup(vp); |
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| 487 | cp = next; |
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| 488 | } |
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| 489 | plist[2*nparams] = NULL; |
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| 490 | free(params); |
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| 491 | if(ocuri->paramlist != NULL) |
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| 492 | ocparamfree(ocuri->paramlist); |
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| 493 | ocuri->paramlist = plist; |
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| 494 | return 1; |
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| 495 | } |
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| 496 | |
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| 497 | const char* |
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| 498 | ocurilookup(OCURI* uri, const char* key) |
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| 499 | { |
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| 500 | int i; |
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| 501 | if(uri == NULL || key == NULL || uri->params == NULL) return NULL; |
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| 502 | if(uri->paramlist == NULL) { |
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| 503 | i = ocuridecodeparams(uri); |
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| 504 | if(!i) return 0; |
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| 505 | } |
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| 506 | i = ocfind(uri->paramlist,key); |
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| 507 | if(i >= 0) |
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| 508 | return uri->paramlist[(2*i)+1]; |
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| 509 | return NULL; |
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| 510 | } |
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| 511 | |
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| 512 | int |
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| 513 | ocurisetparams(OCURI* uri, const char* newparams) |
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| 514 | { |
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| 515 | if(uri == NULL) return 0; |
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| 516 | if(uri->paramlist != NULL) ocparamfree(uri->paramlist); |
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| 517 | uri->paramlist = NULL; |
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| 518 | if(uri->params != NULL) free(uri->params); |
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| 519 | uri->params = nulldup(newparams); |
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| 520 | return 1; |
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| 521 | } |
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| 522 | |
---|
| 523 | /* Internal version of lookup; returns the paired index of the key */ |
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| 524 | static int |
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| 525 | ocfind(char** params, const char* key) |
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| 526 | { |
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| 527 | int i; |
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| 528 | char** p; |
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| 529 | for(i=0,p=params;*p;p+=2,i++) { |
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| 530 | if(strcmp(key,*p)==0) return i; |
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| 531 | } |
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| 532 | return -1; |
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| 533 | } |
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| 534 | |
---|
| 535 | static void |
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| 536 | ocparamfree(char** params) |
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| 537 | { |
---|
| 538 | char** p; |
---|
| 539 | if(params == NULL) return; |
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| 540 | for(p=params;*p;p+=2) { |
---|
| 541 | free(*p); |
---|
| 542 | if(p[1] != NULL) free(p[1]); |
---|
| 543 | } |
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| 544 | free(params); |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | #ifdef OCIGNORE |
---|
| 548 | /* |
---|
| 549 | Delete the entry. |
---|
| 550 | return value = 1 => found and deleted; |
---|
| 551 | 0 => param not found |
---|
| 552 | */ |
---|
| 553 | int |
---|
| 554 | ocparamdelete(char** params, const char* key) |
---|
| 555 | { |
---|
| 556 | int i; |
---|
| 557 | char** p; |
---|
| 558 | char** q; |
---|
| 559 | if(params == NULL || key == NULL) return 0; |
---|
| 560 | i = ocfind(params,key); |
---|
| 561 | if(i < 0) return 0; |
---|
| 562 | p = params+(2*i); |
---|
| 563 | for(q=p+2;*q;) { |
---|
| 564 | *p++ = *q++; |
---|
| 565 | } |
---|
| 566 | *p = NULL; |
---|
| 567 | return 1; |
---|
| 568 | } |
---|
| 569 | |
---|
| 570 | static int |
---|
| 571 | oclength(char** params) |
---|
| 572 | { |
---|
| 573 | int i = 0; |
---|
| 574 | if(params != NULL) { |
---|
| 575 | while(*params) {params+=2; i++;} |
---|
| 576 | } |
---|
| 577 | return i; |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | /* |
---|
| 581 | Insert new client param (name,value); |
---|
| 582 | return value = 1 => not already defined |
---|
| 583 | 0 => param already defined (no change) |
---|
| 584 | */ |
---|
| 585 | char** |
---|
| 586 | ocparaminsert(char** params, const char* key, const char* value) |
---|
| 587 | { |
---|
| 588 | int i; |
---|
| 589 | char** newp; |
---|
| 590 | size_t len; |
---|
| 591 | if(params == NULL || key == NULL) return 0; |
---|
| 592 | i = ocfind(params,key); |
---|
| 593 | if(i >= 0) return 0; |
---|
| 594 | /* not found, append */ |
---|
| 595 | i = oclength(params); |
---|
| 596 | len = sizeof(char*)*((2*i)+1); |
---|
| 597 | newp = realloc(params,len+2*sizeof(char*)); |
---|
| 598 | memcpy(newp,params,len); |
---|
| 599 | newp[2*i] = nulldup(key); |
---|
| 600 | newp[2*i+1] = (value==NULL?NULL:nulldup(value)); |
---|
| 601 | return newp; |
---|
| 602 | } |
---|
| 603 | |
---|
| 604 | /* |
---|
| 605 | Replace new client param (name,value); |
---|
| 606 | return value = 1 => replacement performed |
---|
| 607 | 0 => key not found (no change) |
---|
| 608 | */ |
---|
| 609 | int |
---|
| 610 | ocparamreplace(char** params, const char* key, const char* value) |
---|
| 611 | { |
---|
| 612 | int i; |
---|
| 613 | if(params == NULL || key == NULL) return 0; |
---|
| 614 | i = ocfind(params,key); |
---|
| 615 | if(i < 0) return 0; |
---|
| 616 | if(params[2*i+1] != NULL) free(params[2*i+1]); |
---|
| 617 | params[2*i+1] = nulldup(value); |
---|
| 618 | return 1; |
---|
| 619 | } |
---|
| 620 | #endif |
---|
| 621 | |
---|
| 622 | |
---|
| 623 | /* Provide % encoders and decoders */ |
---|
| 624 | |
---|
| 625 | |
---|
| 626 | static char* hexchars = "0123456789abcdefABCDEF"; |
---|
| 627 | |
---|
| 628 | static void |
---|
| 629 | toHex(unsigned int b, char hex[2]) |
---|
| 630 | { |
---|
| 631 | hex[0] = hexchars[(b >> 4) & 0xff]; |
---|
| 632 | hex[1] = hexchars[(b) & 0xff]; |
---|
| 633 | } |
---|
| 634 | |
---|
| 635 | |
---|
| 636 | static unsigned int |
---|
| 637 | fromHex(int c) |
---|
| 638 | { |
---|
| 639 | if(c >= '0' && c <= '9') return (c - '0'); |
---|
| 640 | if(c >= 'a' && c <= 'f') return (10 + (c - 'a')); |
---|
| 641 | if(c >= 'A' && c <= 'F') return (10 + (c - 'A')); |
---|
| 642 | return -1; |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | |
---|
| 646 | /* Return a string representing encoding of input; caller must free; |
---|
| 647 | watch out: will encode whole string, so watch what you give it. |
---|
| 648 | Allowable argument specifies characters that do not need escaping. |
---|
| 649 | */ |
---|
| 650 | |
---|
| 651 | char* |
---|
| 652 | ocuriencode(char* s, char* allowable) |
---|
| 653 | { |
---|
| 654 | size_t slen; |
---|
| 655 | char* encoded; |
---|
| 656 | char* inptr; |
---|
| 657 | char* outptr; |
---|
| 658 | |
---|
| 659 | if(s == NULL) return NULL; |
---|
| 660 | |
---|
| 661 | slen = strlen(s); |
---|
| 662 | encoded = (char*)malloc((3*slen) + 1); /* max possible size */ |
---|
| 663 | |
---|
| 664 | for(inptr=s,outptr=encoded;*inptr;) { |
---|
| 665 | int c = *inptr++; |
---|
| 666 | if(c == ' ') { |
---|
| 667 | *outptr++ = '+'; |
---|
| 668 | } else { |
---|
| 669 | /* search allowable */ |
---|
| 670 | int c2; |
---|
| 671 | char* a = allowable; |
---|
| 672 | while((c2=*a++)) { |
---|
| 673 | if(c == c2) break; |
---|
| 674 | } |
---|
| 675 | if(c2) {*outptr++ = c;} |
---|
| 676 | else { |
---|
| 677 | char hex[2]; |
---|
| 678 | toHex(c,hex); |
---|
| 679 | *outptr++ = '%'; |
---|
| 680 | *outptr++ = hex[0]; |
---|
| 681 | *outptr++ = hex[1]; |
---|
| 682 | } |
---|
| 683 | } |
---|
| 684 | } |
---|
| 685 | *outptr = '\0'; |
---|
| 686 | return encoded; |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | /* Return a string representing decoding of input; caller must free;*/ |
---|
| 690 | char* |
---|
| 691 | ocuridecode(char* s) |
---|
| 692 | { |
---|
| 693 | return ocuridecodeonly(s,NULL); |
---|
| 694 | } |
---|
| 695 | |
---|
| 696 | /* Return a string representing decoding of input only for specified |
---|
| 697 | characters; caller must free |
---|
| 698 | */ |
---|
| 699 | char* |
---|
| 700 | ocuridecodeonly(char* s, char* only) |
---|
| 701 | { |
---|
| 702 | size_t slen; |
---|
| 703 | char* decoded; |
---|
| 704 | char* outptr; |
---|
| 705 | char* inptr; |
---|
| 706 | unsigned int c; |
---|
| 707 | |
---|
| 708 | if (s == NULL) return NULL; |
---|
| 709 | if(only == NULL) only = ""; |
---|
| 710 | |
---|
| 711 | slen = strlen(s); |
---|
| 712 | decoded = (char*)malloc(slen+1); /* Should be max we need */ |
---|
| 713 | |
---|
| 714 | outptr = decoded; |
---|
| 715 | inptr = s; |
---|
| 716 | while((c = *inptr++)) { |
---|
| 717 | if(c == '+' && strchr(only,'+') != NULL) |
---|
| 718 | *outptr++ = ' '; |
---|
| 719 | else if(c == '%') { |
---|
| 720 | /* try to pull two hex more characters */ |
---|
| 721 | if(inptr[0] != '\0' && inptr[1] != '\0' |
---|
| 722 | && strchr(hexchars,inptr[0]) != NULL |
---|
| 723 | && strchr(hexchars,inptr[1]) != NULL) { |
---|
| 724 | /* test conversion */ |
---|
| 725 | int xc = (fromHex(inptr[0]) << 4) | (fromHex(inptr[1])); |
---|
| 726 | if(strchr(only,xc) != NULL) { |
---|
| 727 | inptr += 2; /* decode it */ |
---|
| 728 | c = xc; |
---|
| 729 | } |
---|
| 730 | } |
---|
| 731 | } |
---|
| 732 | *outptr++ = c; |
---|
| 733 | } |
---|
| 734 | *outptr = '\0'; |
---|
| 735 | return decoded; |
---|
| 736 | } |
---|
| 737 | |
---|