New uploader for linux with makefile changes to generate library + command line util.

common/linux/libcurl_wrapper.cc

Index: common/linux/libcurl_wrapper.cc
===================================================================
--- common/linux/libcurl_wrapper.cc	(revision 0)
+++ common/linux/libcurl_wrapper.cc	(revision 0)
@@ -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;
+}
+
+}