1 | /* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc. |
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2 | See the COPYRIGHT file for more information. */ |
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3 | |
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4 | #include "config.h" |
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5 | #include <stdio.h> |
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6 | #include <fcntl.h> |
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7 | #include <errno.h> |
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8 | |
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9 | #ifdef HAVE_UNISTD_H |
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10 | #include <unistd.h> |
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11 | #endif |
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12 | |
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13 | #include "ocinternal.h" |
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14 | #include "ocdebug.h" |
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15 | #include "ocdata.h" |
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16 | #include "occontent.h" |
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17 | #include "occlientparams.h" |
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18 | #include "ocrc.h" |
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19 | #include "occurlfunctions.h" |
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20 | |
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21 | #include "ochttp.h" |
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22 | #include "ocread.h" |
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23 | |
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24 | /* Note: TMPPATH must end in '/' */ |
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25 | #ifdef __CYGWIN__ |
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26 | #define TMPPATH1 "/cygdrive/c/temp/" |
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27 | #define TMPPATH2 "./" |
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28 | #elifdef WIN32 |
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29 | #define TMPPATH1 "c:\\temp/" |
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30 | #define TMPPATH2 ".\\" |
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31 | #else |
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32 | #define TMPPATH1 "/tmp/" |
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33 | #define TMPPATH2 "./" |
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34 | #endif |
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35 | |
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36 | /* Define default rc files and aliases*/ |
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37 | static char* rcfilenames[3] = {".dodsrc",".ocrc",NULL}; |
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38 | |
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39 | static int ocextractddsinmemory(OCstate*,OCtree*,int); |
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40 | static int ocextractddsinfile(OCstate*,OCtree*,int); |
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41 | static char* constraintescape(const char* url); |
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42 | static OCerror createtempfile(OCstate*,OCtree*); |
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43 | static int createtempfile1(char*,char**); |
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44 | |
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45 | static void ocsetcurlproperties(OCstate*); |
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46 | |
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47 | extern OCnode* makeunlimiteddimension(void); |
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48 | |
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49 | #ifdef WIN32 |
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50 | #include <fcntl.h> |
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51 | #define _S_IREAD 256 |
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52 | #define _S_IWRITE 128 |
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53 | #else |
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54 | #include <sys/stat.h> |
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55 | #endif |
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56 | |
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57 | /* Global flags*/ |
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58 | int oc_curl_file_supported; |
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59 | int oc_curl_https_supported; |
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60 | |
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61 | int |
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62 | ocinternalinitialize(void) |
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63 | { |
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64 | int stat = OC_NOERR; |
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65 | |
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66 | /* Compute some xdr related flags */ |
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67 | xxdr_init(); |
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68 | |
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69 | oc_loginit(); |
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70 | |
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71 | /* Determine if this version of curl supports |
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72 | "file://..." &/or "https://..." urls. |
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73 | */ |
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74 | { |
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75 | const char* const* proto; /*weird*/ |
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76 | curl_version_info_data* curldata; |
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77 | curldata = curl_version_info(CURLVERSION_NOW); |
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78 | oc_curl_file_supported = 0; |
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79 | oc_curl_https_supported = 0; |
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80 | for(proto=curldata->protocols;*proto;proto++) { |
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81 | if(strcmp("file",*proto)==0) {oc_curl_file_supported=1;break;} |
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82 | if(strcmp("https",*proto)==0) {oc_curl_https_supported=1;break;} |
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83 | } |
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84 | if(ocdebug > 0) { |
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85 | oc_log(LOGNOTE,"Curl file:// support = %d",oc_curl_file_supported); |
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86 | oc_log(LOGNOTE,"Curl https:// support = %d",oc_curl_file_supported); |
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87 | } |
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88 | } |
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89 | |
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90 | /* compile the .dodsrc, if any */ |
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91 | { |
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92 | char* path = NULL; |
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93 | char* homepath = NULL; |
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94 | char** alias; |
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95 | FILE* f = NULL; |
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96 | /* locate the configuration files: . first in '.', then $HOME */ |
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97 | for(alias=rcfilenames;*alias;alias++) { |
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98 | path = (char*)malloc(strlen("./")+strlen(*alias)+1); |
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99 | if(path == NULL) return OC_ENOMEM; |
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100 | strcpy(path,"./"); |
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101 | strcat(path,*alias); |
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102 | /* see if file is readable */ |
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103 | f = fopen(path,"r"); |
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104 | if(f != NULL) break; |
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105 | if(path != NULL) {free(path); path = NULL;} /* cleanup */ |
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106 | } |
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107 | if(f == NULL) { /* try $HOME */ |
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108 | OCASSERT(path == NULL); |
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109 | homepath = getenv("HOME"); |
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110 | if (homepath!= NULL) { |
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111 | for(alias=rcfilenames;*alias;alias++) { |
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112 | path = (char*)malloc(strlen(homepath)+1+strlen(*alias)+1); |
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113 | if(path == NULL) return OC_ENOMEM; |
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114 | strcpy(path,homepath); |
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115 | strcat(path,"/"); |
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116 | strcat(path,*alias); |
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117 | f = fopen(path,"r"); |
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118 | if(f != NULL) break; |
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119 | if(path != NULL) {free(path); path=NULL;} |
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120 | } |
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121 | } |
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122 | } |
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123 | if(f == NULL) { |
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124 | oc_log(LOGDBG,"Cannot find runtime configuration file"); |
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125 | } else { |
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126 | OCASSERT(path != NULL); |
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127 | fclose(f); |
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128 | if(ocdebug > 1) |
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129 | fprintf(stderr, "DODS RC file: %s\n", path); |
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130 | if(ocdodsrc_read(*alias,path) == 0) |
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131 | oc_log(LOGERR, "Error parsing %s\n",path); |
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132 | } |
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133 | if(path != NULL) free(path); |
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134 | } |
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135 | return OCTHROW(stat); |
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136 | } |
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137 | |
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138 | /**************************************************/ |
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139 | OCerror |
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140 | ocopen(OCstate** statep, const char* url) |
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141 | { |
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142 | int stat = OC_NOERR; |
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143 | OCstate * state = NULL; |
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144 | OCURI* tmpurl = NULL; |
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145 | CURL* curl = NULL; /* curl handle*/ |
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146 | |
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147 | if(!ocuriparse(url,&tmpurl)) {OCTHROWCHK(stat=OC_EBADURL); goto fail;} |
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148 | |
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149 | stat = occurlopen(&curl); |
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150 | if(stat != OC_NOERR) {OCTHROWCHK(stat); goto fail;} |
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151 | |
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152 | state = (OCstate*)ocmalloc(sizeof(OCstate)); /* ocmalloc zeros memory*/ |
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153 | if(state == NULL) {OCTHROWCHK(stat=OC_ENOMEM); goto fail;} |
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154 | |
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155 | /* Setup DAP state*/ |
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156 | state->magic = OCMAGIC; |
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157 | state->curl = curl; |
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158 | state->trees = oclistnew(); |
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159 | state->uri = tmpurl; |
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160 | if(!ocuridecodeparams(state->uri)) { |
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161 | oc_log(LOGWARN,"Could not parse client parameters"); |
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162 | } |
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163 | state->packet = ocbytesnew(); |
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164 | ocbytessetalloc(state->packet,DFALTPACKETSIZE); /*initial reasonable size*/ |
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165 | |
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166 | /* set curl properties for this link */ |
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167 | ocsetcurlproperties(state); |
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168 | |
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169 | /* Set up list to support reuse/reclamation of OCcontent objects. */ |
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170 | state->contentlist = NULL; |
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171 | |
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172 | if(statep) *statep = state; |
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173 | return OCTHROW(stat); |
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174 | |
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175 | fail: |
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176 | ocurifree(tmpurl); |
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177 | if(state != NULL) ocfree(state); |
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178 | if(curl != NULL) occurlclose(curl); |
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179 | return OCTHROW(stat); |
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180 | } |
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181 | |
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182 | OCerror |
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183 | ocfetchf(OCstate* state, const char* constraint, OCdxd kind, OCflags flags, |
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184 | OCnode** rootp) |
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185 | { |
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186 | OCtree* tree = NULL; |
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187 | OCnode* root = NULL; |
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188 | OCerror stat = OC_NOERR; |
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189 | |
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190 | tree = (OCtree*)ocmalloc(sizeof(OCtree)); |
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191 | MEMCHECK(tree,OC_ENOMEM); |
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192 | memset((void*)tree,0,sizeof(OCtree)); |
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193 | tree->dxdclass = kind; |
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194 | tree->state = state; |
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195 | tree->constraint = constraintescape(constraint); |
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196 | if(tree->constraint == NULL) |
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197 | tree->constraint = nulldup(constraint); |
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198 | |
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199 | /* Set curl properties: pwd, flags, proxies, ssl */ |
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200 | if((stat=ocset_user_password(state))!= OC_NOERR) goto fail; |
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201 | if((stat=ocset_curl_flags(state)) != OC_NOERR) goto fail; |
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202 | if((stat=ocset_proxy(state)) != OC_NOERR) goto fail; |
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203 | if((stat=ocset_ssl(state)) != OC_NOERR) goto fail; |
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204 | |
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205 | ocbytesclear(state->packet); |
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206 | |
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207 | switch (kind) { |
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208 | case OCDAS: |
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209 | stat = readDAS(state,tree); |
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210 | if(stat == OC_NOERR) { |
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211 | tree->text = ocbytesdup(state->packet); |
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212 | if(tree->text == NULL) stat = OC_EDAS; |
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213 | } |
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214 | break; |
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215 | case OCDDS: |
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216 | stat = readDDS(state,tree); |
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217 | if(stat == OC_NOERR) { |
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218 | tree->text = ocbytesdup(state->packet); |
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219 | if(tree->text == NULL) stat = OC_EDDS; |
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220 | } |
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221 | break; |
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222 | case OCDATADDS: |
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223 | if((flags & OCONDISK) != 0) {/* store in file */ |
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224 | /* Create the datadds file immediately |
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225 | so that DRNO can reference it*/ |
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226 | /* Make the tmp file*/ |
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227 | stat = createtempfile(state,tree); |
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228 | if(stat) {OCTHROWCHK(stat); goto unwind;} |
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229 | stat = readDATADDS(state,tree,flags); |
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230 | if(stat == OC_NOERR) { |
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231 | /* Separate the DDS from data and return the dds; |
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232 | will modify packet */ |
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233 | stat = ocextractddsinfile(state,tree,flags); |
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234 | } |
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235 | } else { /*in memory*/ |
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236 | stat = readDATADDS(state,tree,flags); |
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237 | if(stat == OC_NOERR) { |
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238 | /* Separate the DDS from data and return the dds; |
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239 | will modify packet */ |
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240 | stat = ocextractddsinmemory(state,tree,flags); |
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241 | } |
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242 | } |
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243 | break; |
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244 | }/*switch*/ |
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245 | if(stat != OC_NOERR) { |
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246 | /* Obtain any http code */ |
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247 | state->error.httpcode = ocfetchhttpcode(state->curl); |
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248 | if(state->error.httpcode >= 400) { |
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249 | oc_log(LOGWARN,"oc_open: Could not read url; http error = %l",state->error.httpcode); |
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250 | } else { |
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251 | oc_log(LOGWARN,"oc_open: Could not read url"); |
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252 | } |
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253 | return OCTHROW(stat); |
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254 | } |
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255 | |
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256 | tree->nodes = NULL; |
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257 | stat = DAPparse(state,tree,tree->text); |
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258 | /* Check and report on an error return from the server */ |
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259 | if(stat == OC_EDAPSVC && state->error.code != NULL) { |
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260 | oc_log(LOGERR,"oc_open: server error retrieving url: code=%s message=\"%s\"", |
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261 | state->error.code, |
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262 | (state->error.message?state->error.message:"")); |
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263 | } |
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264 | if(stat) {OCTHROWCHK(stat); goto unwind;} |
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265 | root = tree->root; |
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266 | /* make sure */ |
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267 | tree->root = root; |
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268 | root->tree = tree; |
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269 | |
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270 | /* Verify the parse */ |
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271 | switch (kind) { |
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272 | case OCDAS: |
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273 | if(root->octype != OC_Attributeset) |
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274 | {OCTHROWCHK(stat=OC_EDAS); goto unwind;} |
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275 | break; |
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276 | case OCDDS: |
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277 | if(root->octype != OC_Dataset) |
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278 | {OCTHROWCHK(stat=OC_EDDS); goto unwind;} |
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279 | break; |
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280 | case OCDATADDS: |
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281 | if(root->octype != OC_Dataset) |
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282 | {OCTHROWCHK(stat=OC_EDATADDS); goto unwind;} |
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283 | /* Modify the tree kind */ |
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284 | tree->dxdclass = OCDATADDS; |
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285 | break; |
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286 | default: return OC_EINVAL; |
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287 | } |
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288 | |
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289 | if(kind != OCDAS) { |
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290 | /* Process ocnodes to assign offsets and sizes where possible */ |
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291 | occomputeskipdata(state,root); |
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292 | /* Process ocnodes to mark those that are cacheable */ |
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293 | ocmarkcacheable(state,root); |
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294 | /* Process ocnodes to handle various semantic issues*/ |
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295 | occomputesemantics(tree->nodes); |
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296 | } |
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297 | |
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298 | /* Process ocnodes to compute name info*/ |
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299 | occomputefullnames(tree->root); |
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300 | |
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301 | if(kind == OCDATADDS) { |
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302 | if((flags & OCONDISK) != 0) { |
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303 | tree->data.xdrs = xxdr_filecreate(tree->data.file,tree->data.bod); |
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304 | } else { |
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305 | /* Switch to zero based memory */ |
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306 | tree->data.xdrs |
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307 | = xxdr_memcreate(tree->data.memory,tree->data.datasize,tree->data.bod); |
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308 | } |
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309 | MEMCHECK(tree->data.xdrs,OC_ENOMEM); |
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310 | } |
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311 | |
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312 | /* Put root into the state->trees list */ |
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313 | oclistpush(state->trees,(ocelem)root); |
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314 | |
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315 | if(rootp) *rootp = root; |
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316 | return stat; |
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317 | |
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318 | unwind: |
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319 | ocfreetree(tree); |
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320 | fail: |
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321 | return OCTHROW(stat); |
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322 | } |
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323 | |
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324 | void |
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325 | occlose(OCstate* state) |
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326 | { |
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327 | unsigned int i; |
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328 | if(state == NULL) return; |
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329 | |
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330 | /* Warning: ocfreeroot will attempt to remove the root from state->trees */ |
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331 | /* Ok in this case because we are popping the root out of state->trees */ |
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332 | for(i=0;i<oclistlength(state->trees);i++) { |
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333 | OCnode* root = (OCnode*)oclistpop(state->trees); |
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334 | ocfreeroot(root); |
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335 | } |
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336 | oclistfree(state->trees); |
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337 | ocurifree(state->uri); |
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338 | ocbytesfree(state->packet); |
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339 | ocfree(state->error.code); |
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340 | ocfree(state->error.message); |
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341 | if(state->contentlist != NULL) { |
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342 | struct OCcontent* next; |
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343 | struct OCcontent* curr = state->contentlist; |
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344 | while(curr != NULL) { |
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345 | next = curr->next; |
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346 | ocfree(curr); |
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347 | curr = next; |
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348 | } |
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349 | } |
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350 | ocfree(state->curlflags.useragent); |
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351 | ocfree(state->curlflags.cookiejar); |
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352 | ocfree(state->curlflags.cookiefile); |
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353 | ocfree(state->ssl.certificate); |
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354 | ocfree(state->ssl.key); |
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355 | ocfree(state->ssl.keypasswd); |
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356 | ocfree(state->ssl.cainfo); |
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357 | ocfree(state->ssl.capath); |
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358 | ocfree(state->proxy.host); |
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359 | ocfree(state->creds.username); |
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360 | ocfree(state->creds.password); |
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361 | if(state->curl != NULL) occurlclose(state->curl); |
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362 | ocfree(state); |
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363 | } |
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364 | |
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365 | static OCerror |
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366 | ocextractddsinmemory(OCstate* state, OCtree* tree, OCflags flags) |
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367 | { |
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368 | OCerror stat = OC_NOERR; |
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369 | size_t ddslen, bod, bodfound; |
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370 | /* Read until we find the separator (or EOF)*/ |
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371 | bodfound = findbod(state->packet,&bod,&ddslen); |
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372 | if(!bodfound) {/* No BOD; pretend */ |
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373 | bod = tree->data.bod; |
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374 | ddslen = tree->data.datasize; |
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375 | } |
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376 | tree->data.bod = bod; |
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377 | tree->data.ddslen = ddslen; |
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378 | /* copy out the dds */ |
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379 | if(ddslen > 0) { |
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380 | tree->text = (char*)ocmalloc(ddslen+1); |
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381 | memcpy((void*)tree->text,(void*)ocbytescontents(state->packet),ddslen); |
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382 | tree->text[ddslen] = '\0'; |
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383 | } else |
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384 | tree->text = NULL; |
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385 | /* Extract the inmemory contents */ |
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386 | tree->data.memory = ocbytesextract(state->packet); |
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387 | #ifdef OCIGNORE |
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388 | /* guarantee the data part is on an 8 byte boundary */ |
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389 | if(tree->data.bod % 8 != 0) { |
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390 | unsigned long count = tree->data.datasize - tree->data.bod; |
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391 | memcpy(tree->xdrmemory,tree->xdrmemory+tree->data.bod,count); |
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392 | tree->data.datasize = count; |
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393 | tree->data.bod = 0; |
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394 | tree->data.ddslen = 0; |
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395 | } |
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396 | #endif |
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397 | if(tree->text == NULL) stat = OC_EDATADDS; |
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398 | return OCTHROW(stat); |
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399 | } |
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400 | |
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401 | static OCerror |
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402 | ocextractddsinfile(OCstate* state, OCtree* tree, OCflags flags) |
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403 | { |
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404 | OCerror stat = OC_NOERR; |
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405 | size_t ddslen, bod, bodfound; |
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406 | |
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407 | /* Read until we find the separator (or EOF)*/ |
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408 | ocbytesclear(state->packet); |
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409 | rewind(tree->data.file); |
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410 | bodfound = 0; |
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411 | do { |
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412 | char chunk[1024]; |
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413 | size_t count; |
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414 | /* read chunks of the file until we find the separator*/ |
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415 | count = fread(chunk,1,sizeof(chunk),tree->data.file); |
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416 | if(count <= 0) break; /* EOF;*/ |
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417 | ocbytesappendn(state->packet,chunk,count); |
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418 | bodfound = findbod(state->packet,&bod,&ddslen); |
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419 | } while(!bodfound); |
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420 | if(!bodfound) {/* No BOD; pretend */ |
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421 | bod = tree->data.bod; |
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422 | ddslen = tree->data.datasize; |
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423 | } |
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424 | tree->data.bod = bod; |
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425 | tree->data.ddslen = ddslen; |
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426 | /* copy out the dds */ |
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427 | if(ddslen > 0) { |
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428 | tree->text = (char*)ocmalloc(ddslen+1); |
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429 | memcpy((void*)tree->text,(void*)ocbytescontents(state->packet),ddslen); |
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430 | tree->text[ddslen] = '\0'; |
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431 | } else |
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432 | tree->text = NULL; |
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433 | /* reset the position of the tmp file*/ |
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434 | fseek(tree->data.file,tree->data.bod,SEEK_SET); |
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435 | if(tree->text == NULL) stat = OC_EDATADDS; |
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436 | return OCTHROW(stat); |
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437 | } |
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438 | |
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439 | static OCerror |
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440 | createtempfile(OCstate* state, OCtree* tree) |
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441 | { |
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442 | int fd; |
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443 | char* name = NULL; |
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444 | fd = createtempfile1(TMPPATH1,&name); |
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445 | if(fd < 0) |
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446 | fd = createtempfile1(TMPPATH2,&name); |
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447 | if(fd < 0) { |
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448 | oc_log(LOGERR,"oc_open: attempt to open tmp file failed: %s",name); |
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449 | return errno; |
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450 | } |
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451 | #ifdef OCDEBUG |
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452 | oc_log(LOGNOTE,"oc_open: using tmp file: %s",name); |
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453 | #endif |
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454 | tree->data.filename = name; /* remember our tmp file name */ |
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455 | tree->data.file = fdopen(fd,"w+"); |
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456 | if(tree->data.file == NULL) return OC_EOPEN; |
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457 | /* unlink the temp file so it will automatically be reclaimed */ |
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458 | if(ocdebug == 0) unlink(tree->data.filename); |
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459 | return OC_NOERR; |
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460 | } |
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461 | |
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462 | int |
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463 | createtempfile1(char* tmppath, char** tmpnamep) |
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464 | { |
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465 | int fd = 0; |
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466 | char* tmpname = NULL; |
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467 | tmpname = (char*)malloc(strlen(tmppath)+strlen("dataddsXXXXXX")+1); |
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468 | if(tmpname == NULL) return -1; |
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469 | strcpy(tmpname,tmppath); |
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470 | #ifdef HAVE_MKSTEMP |
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471 | strcat(tmpname,"dataddsXXXXXX"); |
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472 | /* Note Potential problem: old versions of this function |
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473 | leave the file in mode 0666 instead of 0600 */ |
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474 | fd = mkstemp(tmpname); |
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475 | #else /* !HAVE_MKSTEMP */ |
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476 | /* Need to simulate by using some kind of pseudo-random number */ |
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477 | strcat(tmpname,"datadds"); |
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478 | { |
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479 | int rno = rand(); |
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480 | char spid[7]; |
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481 | if(rno < 0) rno = -rno; |
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482 | sprintf(spid,"%06d",rno); |
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483 | strcat(tmpname,spid); |
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484 | # ifdef WIN32 |
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485 | fd=open(tmpname,O_RDWR|O_BINARY|O_CREAT|O_EXCL|FILE_ATTRIBUTE_TEMPORARY, _S_IREAD|_S_IWRITE); |
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486 | # else |
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487 | fd=open(tmpname,O_RDWR|O_CREAT|O_EXCL, S_IRWXU); |
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488 | # endif |
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489 | } |
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490 | #endif /* !HAVE_MKSTEMP */ |
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491 | if(tmpname == NULL) return -1; |
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492 | if(tmpnamep) *tmpnamep = tmpname; |
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493 | return fd; |
---|
494 | } |
---|
495 | |
---|
496 | /* Allow these (non-alpha-numerics) to pass thru */ |
---|
497 | static char okchars[] = "&/:;,.=?@'\"<>{}!|\\^[]`~"; |
---|
498 | static char hexdigits[] = "0123456789abcdef"; |
---|
499 | |
---|
500 | |
---|
501 | /* Modify constraint to use %XX escapes */ |
---|
502 | static char* |
---|
503 | constraintescape(const char* url) |
---|
504 | { |
---|
505 | size_t len; |
---|
506 | char* p; |
---|
507 | int c; |
---|
508 | char* eurl; |
---|
509 | |
---|
510 | if(url == NULL) return NULL; |
---|
511 | len = strlen(url); |
---|
512 | eurl = ocmalloc(1+3*len); /* worst case: c -> %xx */ |
---|
513 | MEMCHECK(eurl,NULL); |
---|
514 | p = eurl; |
---|
515 | *p = '\0'; |
---|
516 | while((c=*url++)) { |
---|
517 | if(c >= '0' && c <= '9') {*p++ = c;} |
---|
518 | else if(c >= 'a' && c <= 'z') {*p++ = c;} |
---|
519 | else if(c >= 'A' && c <= 'Z') {*p++ = c;} |
---|
520 | else if(strchr(okchars,c) != NULL) {*p++ = c;} |
---|
521 | else { |
---|
522 | *p++ = '%'; |
---|
523 | *p++ = hexdigits[(c & 0xf0)>>4]; |
---|
524 | *p++ = hexdigits[(c & 0xf)]; |
---|
525 | } |
---|
526 | } |
---|
527 | *p = '\0'; |
---|
528 | return eurl; |
---|
529 | } |
---|
530 | |
---|
531 | OCerror |
---|
532 | ocupdatelastmodifieddata(OCstate* state) |
---|
533 | { |
---|
534 | OCerror status = OC_NOERR; |
---|
535 | long lastmodified; |
---|
536 | char* base = NULL; |
---|
537 | base = ocuribuild(state->uri,NULL,NULL,OCURIENCODE); |
---|
538 | status = ocfetchlastmodified(state->curl, base, &lastmodified); |
---|
539 | free(base); |
---|
540 | if(status == OC_NOERR) { |
---|
541 | state->datalastmodified = lastmodified; |
---|
542 | } |
---|
543 | return status; |
---|
544 | } |
---|
545 | |
---|
546 | /* |
---|
547 | Set curl properties for link based on rc files |
---|
548 | */ |
---|
549 | static void |
---|
550 | ocsetcurlproperties(OCstate* state) |
---|
551 | { |
---|
552 | CURLcode cstat = CURLE_OK; |
---|
553 | |
---|
554 | /* process the triple store wrt to this state */ |
---|
555 | if(ocdodsrc_process(state) != OC_NOERR) { |
---|
556 | oc_log(LOGERR,"Malformed .opendaprc configuration file"); |
---|
557 | goto fail; |
---|
558 | } |
---|
559 | if(state->creds.username == NULL && state->creds.password == NULL) { |
---|
560 | if(state->uri->user != NULL && state->uri->password != NULL) { |
---|
561 | /* this overrides .dodsrc */ |
---|
562 | if(state->creds.password) free(state->creds.password); |
---|
563 | state->creds.password = nulldup(state->uri->password); |
---|
564 | if(state->creds.username) free(state->creds.username); |
---|
565 | state->creds.username = nulldup(state->uri->user); |
---|
566 | } |
---|
567 | } |
---|
568 | return; |
---|
569 | |
---|
570 | fail: |
---|
571 | if(cstat != CURLE_OK) |
---|
572 | oc_log(LOGERR, "curl error: %s", curl_easy_strerror(cstat)); |
---|
573 | return; |
---|
574 | } |
---|