Mercurial > hg > orthanc
view Core/HttpClient.cpp @ 755:584b59a80ffb Orthanc-0.7.4
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 16 Apr 2014 11:42:56 +0200 |
parents | 203157cb4fde |
children | a811bdf8b8eb |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, * Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * In addition, as a special exception, the copyright holders of this * program give permission to link the code of its release with the * OpenSSL project's "OpenSSL" library (or with modified versions of it * that use the same license as the "OpenSSL" library), and distribute * the linked executables. You must obey the GNU General Public License * in all respects for all of the code used other than "OpenSSL". If you * modify file(s) with this exception, you may extend this exception to * your version of the file(s), but you are not obligated to do so. If * you do not wish to do so, delete this exception statement from your * version. If you delete this exception statement from all source files * in the program, then also delete it here. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "HttpClient.h" #include "../Core/Toolbox.h" #include "../Core/OrthancException.h" #include <string.h> #include <curl/curl.h> namespace Orthanc { struct HttpClient::PImpl { CURL* curl_; struct curl_slist *postHeaders_; }; static CURLcode CheckCode(CURLcode code) { if (code != CURLE_OK) { throw OrthancException("libCURL error: " + std::string(curl_easy_strerror(code))); } return code; } static size_t CurlCallback(void *buffer, size_t size, size_t nmemb, void *payload) { std::string& target = *(static_cast<std::string*>(payload)); size_t length = size * nmemb; if (length == 0) return 0; size_t pos = target.size(); target.resize(pos + length); memcpy(&target.at(pos), buffer, length); return length; } void HttpClient::Setup() { pimpl_->postHeaders_ = NULL; if ((pimpl_->postHeaders_ = curl_slist_append(pimpl_->postHeaders_, "Expect:")) == NULL) { throw OrthancException(ErrorCode_NotEnoughMemory); } pimpl_->curl_ = curl_easy_init(); if (!pimpl_->curl_) { curl_slist_free_all(pimpl_->postHeaders_); throw OrthancException(ErrorCode_NotEnoughMemory); } CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEFUNCTION, &CurlCallback)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HEADER, 0)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_FOLLOWLOCATION, 1)); #if ORTHANC_SSL_ENABLED == 1 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 0)); #endif // This fixes the "longjmp causes uninitialized stack frame" crash // that happens on modern Linux versions. // http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOSIGNAL, 1)); url_ = ""; method_ = HttpMethod_Get; lastStatus_ = HttpStatus_200_Ok; isVerbose_ = false; } HttpClient::HttpClient() : pimpl_(new PImpl) { Setup(); } HttpClient::HttpClient(const HttpClient& other) : pimpl_(new PImpl) { Setup(); if (other.IsVerbose()) { SetVerbose(true); } if (other.credentials_.size() != 0) { credentials_ = other.credentials_; } } HttpClient::~HttpClient() { curl_easy_cleanup(pimpl_->curl_); curl_slist_free_all(pimpl_->postHeaders_); } void HttpClient::SetVerbose(bool isVerbose) { isVerbose_ = isVerbose; if (isVerbose_) { CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 1)); } else { CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 0)); } } bool HttpClient::Apply(std::string& answer) { answer.clear(); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_URL, url_.c_str())); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEDATA, &answer)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, NULL)); if (credentials_.size() != 0) { CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_USERPWD, credentials_.c_str())); } switch (method_) { case HttpMethod_Get: CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 1L)); break; case HttpMethod_Post: CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 1L)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_)); if (postData_.size() > 0) { CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, postData_.c_str())); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, postData_.size())); } else { CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0)); } break; case HttpMethod_Delete: CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 1L)); CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "DELETE")); break; case HttpMethod_Put: CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PUT, 1L)); break; default: throw OrthancException(ErrorCode_InternalError); } // Do the actual request CheckCode(curl_easy_perform(pimpl_->curl_)); long status; CheckCode(curl_easy_getinfo(pimpl_->curl_, CURLINFO_RESPONSE_CODE, &status)); if (status == 0) { // This corresponds to a call to an inexistent host lastStatus_ = HttpStatus_500_InternalServerError; } else { lastStatus_ = static_cast<HttpStatus>(status); } return (status >= 200 && status < 300); } bool HttpClient::Apply(Json::Value& answer) { std::string s; if (Apply(s)) { Json::Reader reader; return reader.parse(s, answer); } else { return false; } } void HttpClient::SetCredentials(const char* username, const char* password) { credentials_ = std::string(username) + ":" + std::string(password); } void HttpClient::GlobalInitialize() { CheckCode(curl_global_init(CURL_GLOBAL_DEFAULT)); } void HttpClient::GlobalFinalize() { curl_global_cleanup(); } }