networkreadstream-curl.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef BACKENDS_NETWORKING_HTTP_CURL_NETWORKREADSTREAMCURL_H
#define BACKENDS_NETWORKING_HTTP_CURL_NETWORKREADSTREAMCURL_H

#define FORBIDDEN_SYMBOL_ALLOW_ALL

#include "backends/networking/http/networkreadstream.h"
#include "common/hash-str.h"
#include "common/hashmap.h"
#include "common/memstream.h"
#include "common/path.h"
#include "common/str.h"
#include "common/stream.h"

#include <curl/curl.h>

namespace Networking {

class NetworkReadStreamCurl : public NetworkReadStream {
private:
    CURL *_easy;
    struct curl_slist *_headersSlist;
    char *_errorBuffer;
    CURLcode _errorCode;
    byte *_bufferCopy; // To use with old curl version where CURLOPT_COPYPOSTFIELDS is not available
    void initCurl(const char *url, RequestHeaders *headersList);
    bool reuseCurl(const char *url, RequestHeaders *headersList);
    static struct curl_slist *requestHeadersToSlist(const RequestHeaders *headersList);

    static size_t curlDataCallback(char *d, size_t n, size_t l, void *p);
    static size_t curlReadDataCallback(char *d, size_t n, size_t l, void *p);
    static size_t curlHeadersCallback(char *d, size_t n, size_t l, void *p);
    static int curlProgressCallbackOlder(void *p, double dltotal, double dlnow, double ultotal, double ulnow);

    // CURL-specific methods
    CURL *getEasyHandle() const { return _easy; }
    void resetStream();
    void setupBufferContents(const byte *buffer, uint32 bufferSize, bool uploading, bool usingPatch, bool post);
    void setupFormMultipart(const Common::HashMap<Common::String, Common::String> &formFields, const Common::HashMap<Common::String, Common::Path> &formFiles);

public:
    NetworkReadStreamCurl(const char *url, RequestHeaders *headersList, const Common::String &postFields, bool uploading, bool usingPatch, bool keepAlive, long keepAliveIdle, long keepAliveInterval);

    NetworkReadStreamCurl(const char *url, RequestHeaders *headersList, const Common::HashMap<Common::String, Common::String> &formFields, const Common::HashMap<Common::String, Common::Path> &formFiles, bool keepAlive, long keepAliveIdle, long keepAliveInterval);

    NetworkReadStreamCurl(const char *url, RequestHeaders *headersList, const byte *buffer, uint32 bufferSize, bool uploading, bool usingPatch, bool post, bool keepAlive, long keepAliveIdle, long keepAliveInterval);

    ~NetworkReadStreamCurl();
    void finished(CURLcode errorCode);

    bool reuse(const char *url, RequestHeaders *headersList, const Common::String &postFields, bool uploading = false, bool usingPatch = false) override;
    bool reuse(
        const char *url, RequestHeaders *headersList,
        const Common::HashMap<Common::String, Common::String> &formFields,
        const Common::HashMap<Common::String, Common::Path> &formFiles) override;
    bool reuse(const char *url, RequestHeaders *headersList, const byte *buffer, uint32 bufferSize, bool uploading = false, bool usingPatch = false, bool post = true) override;

    long httpResponseCode() const override;
    Common::String currentLocation() const override;
    Common::HashMap<Common::String, Common::String> responseHeadersMap() const override;

    bool hasError() const override;
    const char *getError() const override;
};

} // End of namespace Networking

#endif