json_object* OGRPLScenesDataV1Dataset::RunRequest(const char* pszURL,
int bQuiet404Error,
const char* pszHTTPVerb,
bool bExpectJSonReturn,
const char* pszPostContent)
{
char** papszOptions = CSLAddString(GetBaseHTTPOptions(), nullptr);
// We need to set it each time as CURL would reuse the previous value
// if reusing the same connection
papszOptions = CSLSetNameValue(papszOptions, "CUSTOMREQUEST", pszHTTPVerb);
if( pszPostContent != nullptr )
{
CPLString osHeaders = CSLFetchNameValueDef(papszOptions, "HEADERS", "");
if( !osHeaders.empty() )
osHeaders += "\r\n";
osHeaders += "Content-Type: application/json";
papszOptions = CSLSetNameValue(papszOptions, "HEADERS", osHeaders);
papszOptions = CSLSetNameValue(papszOptions, "POSTFIELDS", pszPostContent);
}
papszOptions = CSLSetNameValue(papszOptions, "MAX_RETRY", "3");
CPLHTTPResult *psResult = nullptr;
if( STARTS_WITH(m_osBaseURL, "/vsimem/") &&
STARTS_WITH(pszURL, "/vsimem/") )
{
psResult = (CPLHTTPResult*) CPLCalloc(1, sizeof(CPLHTTPResult));
vsi_l_offset nDataLengthLarge = 0;
CPLString osURL(pszURL);
if( osURL[osURL.size()-1 ] == '/' )
osURL.resize(osURL.size()-1);
if( pszPostContent != nullptr )
{
osURL += "&POSTFIELDS=";
osURL += pszPostContent;
}
CPLDebug("PLSCENES", "Fetching %s", osURL.c_str());
GByte* pabyBuf = VSIGetMemFileBuffer(osURL, &nDataLengthLarge, FALSE);
size_t nDataLength = static_cast<size_t>(nDataLengthLarge);
if( pabyBuf )
{
psResult->pabyData = (GByte*) VSI_MALLOC_VERBOSE(1 + nDataLength);
if( psResult->pabyData )
{
memcpy(psResult->pabyData, pabyBuf, nDataLength);
psResult->pabyData[nDataLength] = 0;
}
}
else
{
psResult->pszErrBuf =
CPLStrdup(CPLSPrintf("Error 404. Cannot find %s", osURL.c_str()));
}
}
else
{
if( bQuiet404Error )
CPLPushErrorHandler(CPLQuietErrorHandler);
psResult = CPLHTTPFetch( pszURL, papszOptions);
if( bQuiet404Error )
CPLPopErrorHandler();
}
CSLDestroy(papszOptions);
if( pszPostContent != nullptr && m_bMustCleanPersistent )
{
papszOptions = CSLSetNameValue(nullptr, "CLOSE_PERSISTENT", CPLSPrintf("PLSCENES:%p", this));
CPLHTTPDestroyResult(CPLHTTPFetch(m_osBaseURL, papszOptions));
CSLDestroy(papszOptions);
m_bMustCleanPersistent = false;
}
if( psResult->pszErrBuf != nullptr )
{
if( !(bQuiet404Error && strstr(psResult->pszErrBuf, "404")) )
{
CPLError(CE_Failure, CPLE_AppDefined, "%s",
psResult->pabyData ? (const char*) psResult->pabyData :
psResult->pszErrBuf);
}
CPLHTTPDestroyResult(psResult);
return nullptr;
}
if( !bExpectJSonReturn && (psResult->pabyData == nullptr || psResult->nDataLen == 0) )
{
CPLHTTPDestroyResult(psResult);
return nullptr;
}
if( psResult->pabyData == nullptr )
{
CPLError(CE_Failure, CPLE_AppDefined, "Empty content returned by server");
CPLHTTPDestroyResult(psResult);
return nullptr;
}
const char* pszText = reinterpret_cast<const char*>(psResult->pabyData);
#ifdef DEBUG_VERBOSE
CPLDebug("PLScenes", "%s", pszText);
#endif
json_object* poObj = nullptr;
if( !OGRJSonParse(pszText, &poObj, true) )
{
CPLHTTPDestroyResult(psResult);
return nullptr;
}
CPLHTTPDestroyResult(psResult);
if( json_object_get_type(poObj) != json_type_object )
{
CPLError( CE_Failure, CPLE_AppDefined, "Return is not a JSON dictionary");
json_object_put(poObj);
poObj = nullptr;
}
return poObj;
}
json_object* OGRPLScenesDataset::RunRequest(const char* pszURL,
int bQuiet404Error)
{
char** papszOptions = CSLAddString(GetBaseHTTPOptions(), NULL);
CPLHTTPResult * psResult;
if( strncmp(osBaseURL, "/vsimem/", strlen("/vsimem/")) == 0 &&
strncmp(pszURL, "/vsimem/", strlen("/vsimem/")) == 0 )
{
CPLDebug("PLSCENES", "Fetching %s", pszURL);
psResult = (CPLHTTPResult*) CPLCalloc(1, sizeof(CPLHTTPResult));
vsi_l_offset nDataLength = 0;
CPLString osURL(pszURL);
if( osURL[osURL.size()-1 ] == '/' )
osURL.resize(osURL.size()-1);
GByte* pabyBuf = VSIGetMemFileBuffer(osURL, &nDataLength, FALSE);
if( pabyBuf )
{
psResult->pabyData = (GByte*) VSIMalloc(1 + nDataLength);
if( psResult->pabyData )
{
memcpy(psResult->pabyData, pabyBuf, nDataLength);
psResult->pabyData[nDataLength] = 0;
}
}
else
{
psResult->pszErrBuf =
CPLStrdup(CPLSPrintf("Error 404. Cannot find %s", pszURL));
}
}
else
{
if( bQuiet404Error )
CPLPushErrorHandler(CPLQuietErrorHandler);
psResult = CPLHTTPFetch( pszURL, papszOptions);
if( bQuiet404Error )
CPLPopErrorHandler();
}
CSLDestroy(papszOptions);
if( psResult->pszErrBuf != NULL )
{
if( !(bQuiet404Error && strstr(psResult->pszErrBuf, "404")) )
{
CPLError(CE_Failure, CPLE_AppDefined, "%s",
psResult->pabyData ? (const char*) psResult->pabyData :
psResult->pszErrBuf);
}
CPLHTTPDestroyResult(psResult);
return NULL;
}
if( psResult->pabyData == NULL )
{
CPLError(CE_Failure, CPLE_AppDefined, "Empty content returned by server");
CPLHTTPDestroyResult(psResult);
return NULL;
}
json_tokener* jstok = NULL;
json_object* poObj = NULL;
jstok = json_tokener_new();
poObj = json_tokener_parse_ex(jstok, (const char*) psResult->pabyData, -1);
if( jstok->err != json_tokener_success)
{
CPLError( CE_Failure, CPLE_AppDefined,
"JSON parsing error: %s (at offset %d)",
json_tokener_error_desc(jstok->err), jstok->char_offset);
json_tokener_free(jstok);
CPLHTTPDestroyResult(psResult);
return NULL;
}
json_tokener_free(jstok);
CPLHTTPDestroyResult(psResult);
if( json_object_get_type(poObj) != json_type_object )
{
CPLError( CE_Failure, CPLE_AppDefined, "Return is not a JSON dictionary");
json_object_put(poObj);
poObj = NULL;
}
return poObj;
}
