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// -*- mode: c++; c-basic-offset:4 -*-
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// This file is part of libdap, A C++ implementation of the OPeNDAP Data
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// Access Protocol.
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// Copyright (c) 2002,2003 OPeNDAP, Inc.
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// Author: James Gallagher <jgallagher@opendap.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
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#ifndef _httpconnect_h
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#define _httpconnect_h
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#include <string>
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#include <curl/curl.h>
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//No longer used in CURL - pwest April 09, 2012
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//#include <curl/types.h>
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#include <curl/easy.h>
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#ifndef _rc_reader_h_
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#include "RCReader.h"
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#endif
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#ifndef _object_type_h
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#include "ObjectType.h"
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#endif
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#ifndef _http_cache_h
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#include "HTTPCache.h"
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#endif
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#ifndef http_response_h
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#include "HTTPResponse.h"
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#endif
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#ifndef _util_h
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#include "util.h"
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#endif
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using std::string;
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using std::vector;
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namespace libdap
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{
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extern int www_trace;
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extern int dods_keep_temps;
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/** Use the CURL library to dereference a HTTP URL. Scan the response for
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headers used by DAP 2.0 and extract their values. The body of the
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response is made available using a FILE pointer.
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@author jhrg */
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class HTTPConnect
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{
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private:
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CURL *d_curl;
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RCReader *d_rcr;
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HTTPCache *d_http_cache;
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char d_error_buffer[CURL_ERROR_SIZE]; // A human-readable message.
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std::string d_content_type; // apparently read by libcurl; this is valid only after curl_easy_perform()
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bool d_accept_deflate;
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string d_username; // extracted from URL
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string d_password; // extracted from URL
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string d_upstring; // used to pass info into curl
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string d_cookie_jar;
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vector<string> d_request_headers; // Request headers
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int d_dap_client_protocol_major;
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int d_dap_client_protocol_minor;
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bool d_use_cpp_streams; // Build HTTPResponse objects using fstream and not FILE*
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void www_lib_init();
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long read_url(const string &url, FILE *stream, vector<string> *resp_hdrs,
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const vector<string> *headers = 0);
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HTTPResponse *plain_fetch_url(const string &url;;
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HTTPResponse *caching_fetch_url(const string &url;;
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bool url_uses_proxy_for(const string &url;;
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bool url_uses_no_proxy_for(const string &url) throw();
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void extract_auth_info(string &url;;
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friend size_t save_raw_http_header(void *ptr, size_t size, size_t nmemb,
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void *http_connect);
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friend class HTTPConnectTest;
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friend class ParseHeader;
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protected:
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/** @name Suppress default methods
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These methods are not supported and are implemented here as protected
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methods to suppress the C++-supplied default versions (which will
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break this object). */
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//@{
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HTTPConnect();
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HTTPConnect(const HTTPConnect &);
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HTTPConnect &operator=(const HTTPConnect &);
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//@}
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public:
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HTTPConnect(RCReader *rcr, bool use_cpp = false);
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virtual ~HTTPConnect();
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void set_credentials(const string &u, const string &p);
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void set_accept_deflate(bool defalte);
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void set_xdap_protocol(int major, int minor);
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bool use_cpp_streams() const { return d_use_cpp_streams; }
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void set_use_cpp_streams(bool use_cpp_streams) { d_use_cpp_streams = use_cpp_streams; }
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/** Set the cookie jar. This function sets the name of a file used to store
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cookies returned by servers. This will help with things like single
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sign on systems.
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@param cookie_jar The pathname to the file that stores cookies. If this
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is the empty string saving cookies is disabled. */
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void set_cookie_jar(const string &cookie_jar) { d_cookie_jar = cookie_jar; }
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/** Set the state of the HTTP cache. By default, the HTTP cache is
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enabled or disabled using the value of the \c USE_CACHE property in
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the \c .dodsrc file. Use this method to set the state from within a
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program.
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@param enabled True to use the cache, False to disable. */
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void set_cache_enabled(bool enabled) {
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if (d_http_cache)
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d_http_cache->set_cache_enabled(enabled);
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}
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/** Return the current state of the HTTP cache. */
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bool is_cache_enabled() { return (d_http_cache) ? d_http_cache->is_cache_enabled() : false; }
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HTTPResponse *fetch_url(const string &url;;
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};
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} // namespace libdap
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#endif // _httpconnect_h
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