HTTPConnect.h

 
// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#ifndef _httpconnect_h
#define _httpconnect_h
 
#include <string>
 
#include <curl/curl.h>
// No longer used in CURL - pwest April 09, 2012
// #include <curl/types.h>
#include <curl/easy.h>
 
#ifndef _rc_reader_h_
#include "RCReader.h"
#endif
 
#ifndef _object_type_h
#include "ObjectType.h"
#endif
 
#ifndef _http_cache_h
#include "HTTPCache.h"
#endif
 
#ifndef http_response_h
#include "HTTPResponse.h"
#endif
 
#ifndef _util_h
#include "util.h"
#endif
 
using std::string;
using std::vector;
 
namespace libdap {
 
extern int www_trace;
extern int www_trace_extensive;
extern int dods_keep_temps;
 
class HTTPConnect {
private:
    CURL *d_curl;
    RCReader *d_rcr;
    HTTPCache *d_http_cache;
 
    char d_error_buffer[CURL_ERROR_SIZE]; // A human-readable message.
    std::string d_content_type;           // apparently read by libcurl; this is valid only after curl_easy_perform()
 
    bool d_accept_deflate;
 
    string d_username; // extracted from URL
    string d_password; // extracted from URL
    string d_upstring; // used to pass info into curl
 
    string d_cookie_jar;
 
    vector<string> d_request_headers; // Request headers
 
    int d_dap_client_protocol_major;
    int d_dap_client_protocol_minor;
 
    bool d_use_cpp_streams; // Build HTTPResponse objects using fstream and not FILE*
 
    void www_lib_init();
    long read_url(const string &url, FILE *stream, vector<string> *resp_hdrs, const vector<string> *headers = 0);
 
    HTTPResponse *plain_fetch_url(const string &url);
    HTTPResponse *caching_fetch_url(const string &url);
 
    bool url_uses_proxy_for(const string &url);
    bool url_uses_no_proxy_for(const string &url) throw();
 
    void extract_auth_info(string &url);
 
    friend size_t save_raw_http_header(void *ptr, size_t size, size_t nmemb, void *http_connect);
    friend class HTTPConnectTest;
    friend class ParseHeader;
 
protected:
    HTTPConnect();
    HTTPConnect(const HTTPConnect &);
    HTTPConnect &operator=(const HTTPConnect &);
 
public:
    HTTPConnect(RCReader *rcr, bool use_cpp = false);
 
    virtual ~HTTPConnect();
 
    void set_credentials(const string &u, const string &p);
    void set_accept_deflate(bool defalte);
    void set_xdap_protocol(int major, int minor);
 
    bool use_cpp_streams() const { return d_use_cpp_streams; }
    void set_use_cpp_streams(bool use_cpp_streams) { d_use_cpp_streams = use_cpp_streams; }
 
    void set_cookie_jar(const string &cookie_jar) { d_cookie_jar = cookie_jar; }
 
    void set_cache_enabled(bool enabled) {
        if (d_http_cache)
            d_http_cache->set_cache_enabled(enabled);
    }
 
    bool is_cache_enabled() { return (d_http_cache) ? d_http_cache->is_cache_enabled() : false; }
 
    HTTPResponse *fetch_url(const string &url);
};
 
} // namespace libdap
 
#endif // _httpconnect_h