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      1 // Copyright (c) 2009, Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 //     * Redistributions of source code must retain the above copyright
      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
     11 // copyright notice, this list of conditions and the following disclaimer
     12 // in the documentation and/or other materials provided with the
     13 // distribution.
     14 //     * Neither the name of Google Inc. nor the names of its
     15 // contributors may be used to endorse or promote products derived from
     16 // this software without specific prior written permission.
     17 //
     18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 // A wrapper for libcurl to do HTTP Uploads, to support easy mocking
     31 // and unit testing of the HTTPUpload class.
     32 
     33 #ifndef COMMON_LINUX_LIBCURL_WRAPPER_H_
     34 #define COMMON_LINUX_LIBCURL_WRAPPER_H_
     35 
     36 #include <string>
     37 #include <map>
     38 
     39 #include "common/using_std_string.h"
     40 #include "third_party/curl/curl.h"
     41 
     42 namespace google_breakpad {
     43 class LibcurlWrapper {
     44  public:
     45   LibcurlWrapper();
     46   ~LibcurlWrapper();
     47   virtual bool Init();
     48   virtual bool SetProxy(const string& proxy_host,
     49                         const string& proxy_userpwd);
     50   virtual bool AddFile(const string& upload_file_path,
     51                        const string& basename);
     52   virtual bool SendRequest(const string& url,
     53                            const std::map<string, string>& parameters,
     54                            int* http_status_code,
     55                            string* http_header_data,
     56                            string* http_response_data);
     57  private:
     58   // This function initializes class state corresponding to function
     59   // pointers into the CURL library.
     60   bool SetFunctionPointers();
     61 
     62   bool init_ok_;                 // Whether init succeeded
     63   void* curl_lib_;               // Pointer to result of dlopen() on
     64                                  // curl library
     65   string last_curl_error_;  // The text of the last error when
     66                                  // dealing
     67   // with CURL.
     68 
     69   CURL *curl_;                   // Pointer for handle for CURL calls.
     70 
     71   CURL* (*easy_init_)(void);
     72 
     73   // Stateful pointers for calling into curl_formadd()
     74   struct curl_httppost *formpost_;
     75   struct curl_httppost *lastptr_;
     76   struct curl_slist *headerlist_;
     77 
     78   // Function pointers into CURL library
     79   CURLcode (*easy_setopt_)(CURL *, CURLoption, ...);
     80   CURLFORMcode (*formadd_)(struct curl_httppost **,
     81                            struct curl_httppost **, ...);
     82   struct curl_slist* (*slist_append_)(struct curl_slist *, const char *);
     83   void (*slist_free_all_)(struct curl_slist *);
     84   CURLcode (*easy_perform_)(CURL *);
     85   const char* (*easy_strerror_)(CURLcode);
     86   void (*easy_cleanup_)(CURL *);
     87   CURLcode (*easy_getinfo_)(CURL *, CURLINFO info, ...);
     88   void (*formfree_)(struct curl_httppost *);
     89 
     90 };
     91 }
     92 
     93 #endif  // COMMON_LINUX_LIBCURL_WRAPPER_H_
     94