libdap++ Updated for version 3.8.2

HTTPConnect.h

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00001 
00002 // -*- mode: c++; c-basic-offset:4 -*-
00003 
00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data
00005 // Access Protocol.
00006 
00007 // Copyright (c) 2002,2003 OPeNDAP, Inc.
00008 // Author: James Gallagher <jgallagher@opendap.org>
00009 //
00010 // This library is free software; you can redistribute it and/or
00011 // modify it under the terms of the GNU Lesser General Public
00012 // License as published by the Free Software Foundation; either
00013 // version 2.1 of the License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 #ifndef _httpconnect_h
00027 #define _httpconnect_h
00028 
00029 
00030 #include <string>
00031 
00032 #include <curl/curl.h>
00033 #include <curl/types.h>
00034 #include <curl/easy.h>
00035 
00036 #ifndef _rc_reader_h_
00037 #include "RCReader.h"
00038 #endif
00039 
00040 #ifndef _object_type_h
00041 #include "ObjectType.h"
00042 #endif
00043 
00044 #ifndef _http_cache_h
00045 #include "HTTPCache.h"
00046 #endif
00047 
00048 #ifndef http_response_h
00049 #include "HTTPResponse.h"
00050 #endif
00051 
00052 #ifndef _util_h
00053 #include "util.h"
00054 #endif
00055 
00056 using std::string;
00057 using std::vector;
00058 
00059 namespace libdap
00060 {
00061 
00062 extern int www_trace;
00063 extern int dods_keep_temps;
00064 
00077 class HTTPConnect
00078 {
00079 private:
00080     CURL *d_curl;
00081     RCReader *d_rcr;
00082     HTTPCache *d_http_cache;
00083 
00084     char d_error_buffer[CURL_ERROR_SIZE]; // A human-readable message.
00085 
00086     bool d_accept_deflate;
00087 
00088     string d_username;  // extracted from URL
00089     string d_password;  // extracted from URL
00090     string d_upstring;  // used to pass info into curl
00091 
00092     string d_cookie_jar;
00093 
00094     vector<string> d_request_headers; // Request headers
00095 
00096     int d_dap_client_protocol_major;
00097     int d_dap_client_protocol_minor;
00098 
00099     void www_lib_init();
00100     long read_url(const string &url, FILE *stream, vector<string> *resp_hdrs,
00101                   const vector<string> *headers = 0);
00102     // string get_temp_file(FILE *&stream) throw(InternalErr);
00103     HTTPResponse *plain_fetch_url(const string &url);
00104     HTTPResponse *caching_fetch_url(const string &url);
00105 
00106     bool url_uses_proxy_for(const string &url) throw();
00107     bool url_uses_no_proxy_for(const string &url) throw();
00108 
00109     void extract_auth_info(string &url);
00110 
00111     friend size_t save_raw_http_header(void *ptr, size_t size, size_t nmemb,
00112                                        void *http_connect);
00113     friend class HTTPConnectTest;
00114     friend class ParseHeader;
00115 
00116 protected:
00122     HTTPConnect() {
00123                 throw InternalErr(__FILE__, __LINE__, "Unimplemented method");
00124         }
00125         HTTPConnect(const HTTPConnect &) {
00126                 throw InternalErr(__FILE__, __LINE__, "Unimplemented method");
00127         }
00128         HTTPConnect &operator=(const HTTPConnect &) {
00129                 throw InternalErr(__FILE__, __LINE__, "Unimplemented assignment");
00130         }
00132 
00133 public:
00134     HTTPConnect(RCReader *rcr);
00135 
00136     virtual ~HTTPConnect();
00137 
00138     void set_credentials(const string &u, const string &p);
00139     void set_accept_deflate(bool defalte);
00140     void set_xdap_protocol(int major, int minor);
00141 
00148     void set_cookie_jar(const string &cookie_jar)
00149     {
00150         d_cookie_jar = cookie_jar;
00151     }
00152 
00158     void set_cache_enabled(bool enabled)
00159     {
00160         if (d_http_cache)
00161             d_http_cache->set_cache_enabled(enabled);
00162     }
00163 
00165     bool is_cache_enabled()
00166     {
00167         return (d_http_cache) ? d_http_cache->is_cache_enabled() : false;
00168     }
00169 
00170     HTTPResponse *fetch_url(const string &url);
00171 };
00172 
00173 } // namespace libdap
00174 
00175 #endif // _httpconnect_h