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 | |
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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) |
---|
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++) { |
---|
530 | if(strcmp(key,*p)==0) return i; |
---|
531 | } |
---|
532 | return -1; |
---|
533 | } |
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534 | |
---|
535 | static void |
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536 | ocparamfree(char** params) |
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537 | { |
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538 | char** p; |
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539 | if(params == NULL) return; |
---|
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 | } |
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546 | |
---|
547 | #ifdef OCIGNORE |
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548 | /* |
---|
549 | Delete the entry. |
---|
550 | return value = 1 => found and deleted; |
---|
551 | 0 => param not found |
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552 | */ |
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553 | int |
---|
554 | ocparamdelete(char** params, const char* key) |
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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 | |
---|