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 <sys/stat.h> |
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6 | #ifdef HAVE_UNISTD_H |
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7 | #include <unistd.h> |
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8 | #endif |
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9 | #include <fcntl.h> |
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10 | #include <sys/types.h> |
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11 | #ifdef HAVE_NETINET_IN_H |
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12 | #include <netinet/in.h> |
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13 | #endif |
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14 | #include "ocinternal.h" |
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15 | #include "ocdebug.h" |
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16 | #include "ochttp.h" |
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17 | #include "ocread.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 | extern int oc_curl_file_supported; |
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22 | |
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23 | /*Forward*/ |
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24 | static int readpacket(CURL*, OCURI*, OCbytes*, OCdxd, long*); |
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25 | static int readfile(char* path, char* suffix, OCbytes* packet); |
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26 | static int readfiletofile(char* path, char* suffix, FILE* stream, unsigned long*); |
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27 | |
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28 | int |
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29 | readDDS(OCstate* state, OCtree* tree) |
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30 | { |
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31 | int stat = OC_NOERR; |
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32 | long lastmodified = -1; |
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33 | |
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34 | |
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35 | ocurisetconstraints(state->uri,tree->constraint); |
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36 | |
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37 | ocset_user_password(state); |
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38 | |
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39 | stat = readpacket(state->curl,state->uri,state->packet,OCDDS, |
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40 | &lastmodified); |
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41 | if(stat == OC_NOERR) state->ddslastmodified = lastmodified; |
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42 | |
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43 | return stat; |
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44 | } |
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45 | |
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46 | int |
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47 | readDAS(OCstate* state, OCtree* tree) |
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48 | { |
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49 | int stat = OC_NOERR; |
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50 | |
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51 | ocurisetconstraints(state->uri,tree->constraint); |
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52 | stat = readpacket(state->curl,state->uri,state->packet,OCDAS,NULL); |
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53 | |
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54 | return stat; |
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55 | } |
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56 | |
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57 | int |
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58 | readversion(CURL* curl, OCURI* url, OCbytes* packet) |
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59 | { |
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60 | return readpacket(curl,url,packet,OCVER,NULL); |
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61 | } |
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62 | |
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63 | static |
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64 | char* ocdxdextension[] ={ |
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65 | ".dds", /*OCDDS*/ |
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66 | ".das", /*OCDAS*/ |
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67 | ".dods", /*OCDATADDS*/ |
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68 | ".vers", /*OCVERS*/ |
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69 | }; |
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70 | |
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71 | static int |
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72 | readpacket(CURL* curl,OCURI* url,OCbytes* packet,OCdxd dxd,long* lastmodified) |
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73 | { |
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74 | int stat = OC_NOERR; |
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75 | int fileprotocol = 0; |
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76 | char* suffix = ocdxdextension[dxd]; |
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77 | char* fetchurl = NULL; |
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78 | |
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79 | fileprotocol = (strcmp(url->protocol,"file")==0); |
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80 | |
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81 | if(fileprotocol && !oc_curl_file_supported) { |
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82 | /* Short circuit file://... urls*/ |
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83 | /* We do this because the test code always needs to read files*/ |
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84 | fetchurl = ocuribuild(url,NULL,NULL,0); |
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85 | stat = readfile(fetchurl,suffix,packet); |
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86 | } else { |
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87 | int flags = 0; |
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88 | if(!fileprotocol) flags |= OCURICONSTRAINTS; |
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89 | flags |= OCURIENCODE; |
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90 | fetchurl = ocuribuild(url,NULL,suffix,flags); |
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91 | MEMCHECK(fetchurl,OC_ENOMEM); |
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92 | if(ocdebug > 0) |
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93 | {fprintf(stderr,"fetch url=%s\n",fetchurl); fflush(stderr);} |
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94 | stat = ocfetchurl(curl,fetchurl,packet,lastmodified); |
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95 | if(ocdebug > 0) |
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96 | {fprintf(stderr,"fetch complete\n"); fflush(stderr);} |
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97 | } |
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98 | free(fetchurl); |
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99 | return OCTHROW(stat); |
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100 | } |
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101 | |
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102 | int |
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103 | readDATADDS(OCstate* state, OCtree* tree, OCflags flags) |
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104 | { |
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105 | int stat = OC_NOERR; |
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106 | long lastmod = -1; |
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107 | |
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108 | if((flags & OCONDISK) == 0) { |
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109 | ocurisetconstraints(state->uri,tree->constraint); |
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110 | stat = readpacket(state->curl,state->uri,state->packet,OCDATADDS,&lastmod); |
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111 | if(stat == OC_NOERR) |
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112 | state->datalastmodified = lastmod; |
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113 | tree->data.datasize = ocbyteslength(state->packet); |
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114 | } else { |
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115 | OCURI* url = state->uri; |
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116 | int fileprotocol = 0; |
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117 | char* readurl = NULL; |
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118 | |
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119 | fileprotocol = (strcmp(url->protocol,"file")==0); |
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120 | |
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121 | if(fileprotocol && !oc_curl_file_supported) { |
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122 | readurl = ocuribuild(url,NULL,NULL,0); |
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123 | stat = readfiletofile(readurl, ".dods", tree->data.file, &tree->data.datasize); |
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124 | } else { |
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125 | int flags = 0; |
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126 | if(!fileprotocol) flags |= OCURICONSTRAINTS; |
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127 | flags |= OCURIENCODE; |
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128 | ocurisetconstraints(url,tree->constraint); |
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129 | readurl = ocuribuild(url,NULL,".dods",flags); |
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130 | MEMCHECK(readurl,OC_ENOMEM); |
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131 | if (ocdebug > 0) |
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132 | {fprintf(stderr, "fetch url=%s\n", readurl);fflush(stderr);} |
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133 | stat = ocfetchurl_file(state->curl, readurl, tree->data.file, |
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134 | &tree->data.datasize, &lastmod); |
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135 | if(stat == OC_NOERR) |
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136 | state->datalastmodified = lastmod; |
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137 | if (ocdebug > 0) |
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138 | {fprintf(stderr,"fetch complete\n"); fflush(stderr);} |
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139 | } |
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140 | free(readurl); |
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141 | } |
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142 | return OCTHROW(stat); |
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143 | } |
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144 | |
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145 | static int |
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146 | readfiletofile(char* path, char* suffix, FILE* stream, unsigned long* sizep) |
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147 | { |
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148 | int stat = OC_NOERR; |
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149 | OCbytes* packet = ocbytesnew(); |
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150 | size_t len; |
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151 | /* check for leading file:/// */ |
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152 | if(ocstrncmp(path,"file:///",8)==0) path += 7; /* assume absolute path*/ |
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153 | stat = readfile(path,suffix,packet); |
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154 | if(stat != OC_NOERR) goto unwind; |
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155 | len = oclistlength(packet); |
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156 | if(stat == OC_NOERR) { |
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157 | size_t written; |
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158 | fseek(stream,0,SEEK_SET); |
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159 | written = fwrite(ocbytescontents(packet),1,len,stream); |
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160 | if(written != len) stat = OC_EIO; |
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161 | } |
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162 | if(sizep != NULL) *sizep = len; |
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163 | unwind: |
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164 | ocbytesfree(packet); |
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165 | return OCTHROW(stat); |
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166 | } |
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167 | |
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168 | static int |
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169 | readfile(char* path, char* suffix, OCbytes* packet) |
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170 | { |
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171 | int stat = OC_NOERR; |
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172 | char buf[1024]; |
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173 | char filename[1024]; |
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174 | int count,size,fd; |
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175 | /* check for leading file:/// */ |
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176 | if(ocstrncmp(path,"file://",7)==0) path += 7; /* assume absolute path*/ |
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177 | strcpy(filename,path); |
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178 | if(suffix != NULL) strcat(filename,suffix); |
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179 | fd = open(filename,O_RDONLY); |
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180 | if(fd < 0) { |
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181 | oc_log(LOGERR,"open failed:%s",filename); |
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182 | return OCTHROW(OC_EOPEN); |
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183 | } |
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184 | size=0; |
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185 | stat = OC_NOERR; |
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186 | for(;;) { |
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187 | count = read(fd,buf,sizeof(buf)); |
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188 | if(count <= 0) |
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189 | break; |
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190 | else if(count < 0) { |
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191 | stat = OC_EIO; |
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192 | oc_log(LOGERR,"read failed: %s",filename); |
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193 | break; |
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194 | } |
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195 | ocbytesappendn(packet,buf,count); |
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196 | size += count; |
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197 | } |
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198 | close(fd); |
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199 | return OCTHROW(stat); |
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200 | } |
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201 | |
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202 | |
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