networkreadstream-emscripten.h

/* ScummVM - Graphic Adventure Engine
 *
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 * 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/>.
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#ifndef BACKENDS_NETWORKING_HTTP_EMSCRIPTEN_NETWORKREADSTREAMEMSCRIPTEN_H
#define BACKENDS_NETWORKING_HTTP_EMSCRIPTEN_NETWORKREADSTREAMEMSCRIPTEN_H
 
#ifdef EMSCRIPTEN
 
#include "backends/networking/http/networkreadstream.h"
 
extern "C" {
// External JS functions for HTTP fetching
extern void NetworkReadStreamEmscripten_init(void);
extern int NetworkReadStreamEmscripten_fetch(const char *method, const char *url,
                                             char **requestHeaders,
                                             const char *requestData, size_t requestDataSize,
                                             char **formFields = nullptr,
                                             char **formFiles = nullptr);
extern void NetworkReadStreamEmscripten_close(int fetchId);
 
// Getter functions for fetch properties
extern char *NetworkReadStreamEmscripten_getDataPtr(int fetchId);
extern char *NetworkReadStreamEmscripten_getErr(int fetchId);
extern uint32 NetworkReadStreamEmscripten_getNumBytes(int fetchId);
extern char **NetworkReadStreamEmscripten_responseHeadersArray(int fetchId);
extern unsigned short NetworkReadStreamEmscripten_status(int fetchId);
extern uint32 NetworkReadStreamEmscripten_totalBytes(int fetchId);
extern bool NetworkReadStreamEmscripten_completed(int fetchId);
extern bool NetworkReadStreamEmscripten_hasError(int fetchId);
}
 
namespace Networking {
 
class NetworkReadStreamEmscripten : public NetworkReadStream {
private:
    int _fetchId; // Fetch ID instead of pointer
    Common::String _url;
    RequestHeaders *_headersList;
    uint32 _readPos; // Current read position in the JS buffer
 
    // Helper methods
    static char **buildHeadersArray(const RequestHeaders *headersList);
    static char **buildFormFieldsArray(const Common::HashMap<Common::String, Common::String> &formFields);
    static char **buildFormFilesArray(const Common::HashMap<Common::String, Common::Path> &formFiles);
    static void cleanupStringArray(char **array);
 
    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:
    NetworkReadStreamEmscripten(const char *url, RequestHeaders *headersList, const Common::String &postFields, bool uploading, bool usingPatch, bool keepAlive, long keepAliveIdle, long keepAliveInterval);
 
    NetworkReadStreamEmscripten(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);
 
    NetworkReadStreamEmscripten(const char *url, RequestHeaders *headersList, const byte *buffer, uint32 bufferSize, bool uploading, bool usingPatch, bool post, bool keepAlive, long keepAliveIdle, long keepAliveInterval);
 
    ~NetworkReadStreamEmscripten() override;
    void initFetch();
 
    // NetworkReadStream interface
    bool reuse(const char *url, RequestHeaders *headersList, const Common::String &postFields, bool uploading = false, bool usingPatch = false) override { return false; }                                                 // no reuse for Emscripten
    bool reuse(const char *url, RequestHeaders *headersList, const Common::HashMap<Common::String, Common::String> &formFields, const Common::HashMap<Common::String, Common::Path> &formFiles) override { return false; } // no reuse for Emscripten
    bool reuse(const char *url, RequestHeaders *headersList, const byte *buffer, uint32 bufferSize, bool uploading = false, bool usingPatch = false, bool post = false) override { return false; }                         // no reuse for Emscripten
 
    bool hasError() const override;
    const char *getError() const override;
    double getProgress() const override;
    long httpResponseCode() const override;
    Common::String currentLocation() const override;
    Common::HashMap<Common::String, Common::String> responseHeadersMap() const override;
 
    uint32 read(void *dataPtr, uint32 dataSize) override;
    bool eos() const override;
};
 
} // End of namespace Networking
 
#endif // EMSCRIPTEN
 
#endif