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Diffstat (limited to 'src/common/linux/libcurl_wrapper.cc')
| -rw-r--r-- | src/common/linux/libcurl_wrapper.cc | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/common/linux/libcurl_wrapper.cc b/src/common/linux/libcurl_wrapper.cc new file mode 100644 index 00000000..5bea3afa --- /dev/null +++ b/src/common/linux/libcurl_wrapper.cc @@ -0,0 +1,209 @@ +// Copyright (c) 2009, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include <curl/curl.h> +#include <curl/easy.h> +#include <curl/types.h> +#include <dlfcn.h> + +#include <string> + +#include "common/linux/libcurl_wrapper.h" +#include "third_party/linux/include/glog/logging.h" + +namespace google_breakpad { +LibcurlWrapper::LibcurlWrapper() + : init_ok_(false), + formpost_(NULL), + lastptr_(NULL), + headerlist_(NULL) { + curl_lib_ = dlopen("libcurl.so", RTLD_NOW); + if (!curl_lib_) { + curl_lib_ = dlopen("libcurl.so.4", RTLD_NOW); + } + if (!curl_lib_) { + curl_lib_ = dlopen("libcurl.so.3", RTLD_NOW); + } + if (!curl_lib_) { + LOG(WARNING) << "Could not find libcurl via dlopen"; + return; + } + LOG(INFO) << "LibcurlWrapper init succeeded"; + init_ok_ = true; + return; +} + +bool LibcurlWrapper::SetProxy(const std::string& proxy_host, + const std::string& proxy_userpwd) { + if (!init_ok_) { + return false; + } + // Set proxy information if necessary. + if (!proxy_host.empty()) { + (*easy_setopt_)(curl_, CURLOPT_PROXY, proxy_host.c_str()); + } else { + LOG(WARNING) << "SetProxy called with empty proxy host."; + return false; + } + if (!proxy_userpwd.empty()) { + (*easy_setopt_)(curl_, CURLOPT_PROXYUSERPWD, proxy_userpwd.c_str()); + } else { + LOG(WARNING) << "SetProxy called with empty proxy username/password."; + return false; + } + LOG(INFO) << "Set proxy host to " << proxy_host; + return true; +} + +bool LibcurlWrapper::AddFile(const std::string& upload_file_path, + const std::string& basename) { + if (!init_ok_) { + return false; + } + LOG(INFO) << "Adding " << upload_file_path << " to form upload."; + // Add form file. + (*formadd_)(&formpost_, &lastptr_, + CURLFORM_COPYNAME, basename.c_str(), + CURLFORM_FILE, upload_file_path.c_str(), + CURLFORM_END); + + return true; +} + +// Callback to get the response data from server. +static size_t WriteCallback(void *ptr, size_t size, + size_t nmemb, void *userp) { + if (!userp) + return 0; + + std::string *response = reinterpret_cast<std::string *>(userp); + size_t real_size = size * nmemb; + response->append(reinterpret_cast<char *>(ptr), real_size); + return real_size; +} + +bool LibcurlWrapper::SendRequest(const std::string& url, + const std::map<std::string, std::string>& parameters, + std::string* server_response) { + (*easy_setopt_)(curl_, CURLOPT_URL, url.c_str()); + std::map<std::string, std::string>::const_iterator iter = parameters.begin(); + for (; iter != parameters.end(); ++iter) + (*formadd_)(&formpost_, &lastptr_, + CURLFORM_COPYNAME, iter->first.c_str(), + CURLFORM_COPYCONTENTS, iter->second.c_str(), + CURLFORM_END); + + (*easy_setopt_)(curl_, CURLOPT_HTTPPOST, formpost_); + if (server_response != NULL) { + (*easy_setopt_)(curl_, CURLOPT_WRITEFUNCTION, WriteCallback); + (*easy_setopt_)(curl_, CURLOPT_WRITEDATA, + reinterpret_cast<void *>(server_response)); + } + + CURLcode err_code = CURLE_OK; + err_code = (*easy_perform_)(curl_); + *(void**) (&easy_strerror_) = dlsym(curl_lib_, "curl_easy_strerror"); +#ifndef NDEBUG + if (err_code != CURLE_OK) + fprintf(stderr, "Failed to send http request to %s, error: %s\n", + url.c_str(), + (*easy_strerror_)(err_code)); +#endif + if (headerlist_ != NULL) { + (*slist_free_all_)(headerlist_); + } + + (*easy_cleanup_)(curl_); + if (formpost_ != NULL) { + (*formfree_)(formpost_); + } + + return err_code == CURLE_OK; +} + +bool LibcurlWrapper::Init() { + if (!init_ok_) { + LOG(WARNING) << "Init_OK was not true in LibcurlWrapper::Init(), check earlier log messages"; + return false; + } + + if (!SetFunctionPointers()) { + LOG(WARNING) << "Could not find function pointers"; + init_ok_ = false; + return false; + } + + curl_ = (*easy_init_)(); + + last_curl_error_ = "No Error"; + + if (!curl_) { + dlclose(curl_lib_); + LOG(WARNING) << "Curl initialization failed"; + return false; + } + + // Disable 100-continue header. + char buf[] = "Expect:"; + + headerlist_ = (*slist_append_)(headerlist_, buf); + (*easy_setopt_)(curl_, CURLOPT_HTTPHEADER, headerlist_); + return true; +} + +#define SET_AND_CHECK_FUNCTION_POINTER(var, function_name) \ + *(void**) (&var) = dlsym(curl_lib_, function_name); \ + if (!var) { \ + LOG(WARNING) << "Could not find libcurl function " << function_name; \ + init_ok_ = false; \ + return false; \ + } + +bool LibcurlWrapper::SetFunctionPointers() { + + SET_AND_CHECK_FUNCTION_POINTER(easy_init_, + "curl_easy_init"); + SET_AND_CHECK_FUNCTION_POINTER(easy_setopt_, + "curl_easy_setopt"); + SET_AND_CHECK_FUNCTION_POINTER(formadd_, + "curl_formadd"); + SET_AND_CHECK_FUNCTION_POINTER(slist_append_, + "curl_slist_append"); + SET_AND_CHECK_FUNCTION_POINTER(easy_perform_, + "curl_easy_perform"); + SET_AND_CHECK_FUNCTION_POINTER(easy_cleanup_, + "curl_easy_cleanup"); + SET_AND_CHECK_FUNCTION_POINTER(slist_free_all_, + "curl_slist_free_all"); + SET_AND_CHECK_FUNCTION_POINTER(formfree_, + "curl_formfree"); + return true; +} + +} |