00001 /* 00002 Copyright (c) 2010, The Barbarian Group 00003 All rights reserved. 00004 00005 Redistribution and use in source and binary forms, with or without modification, are permitted provided that 00006 the following conditions are met: 00007 00008 * Redistributions of source code must retain the above copyright notice, this list of conditions and 00009 the following disclaimer. 00010 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 00011 the following disclaimer in the documentation and/or other materials provided with the distribution. 00012 00013 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 00014 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00015 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 00016 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00017 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00018 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00019 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00020 POSSIBILITY OF SUCH DAMAGE. 00021 */ 00022 00023 #pragma once 00024 00025 #include "cinder/Cinder.h" 00026 #include "cinder/Stream.h" 00027 00028 typedef void CURL; 00029 typedef void CURLM; 00030 00031 namespace cinder { 00032 00033 class Url { 00034 public: 00035 Url() {} 00036 explicit Url( const std::string &urlString ); 00037 00038 std::string str() const { return mStr; } 00039 const char* c_str() const { return mStr.c_str(); } 00040 00041 private: 00042 std::string mStr; 00043 }; 00044 00046 typedef shared_ptr<class IStreamUrl> IStreamUrlRef; 00047 00049 class IStreamUrl : public IStream { 00050 public: 00052 static IStreamUrlRef createRef( const std::string &url, const std::string &user, const std::string &password ); 00053 ~IStreamUrl(); 00054 00055 virtual size_t readDataAvailable( void *dest, size_t maxSize ); 00056 virtual void seekAbsolute( off_t absoluteOffset ); 00057 virtual void seekRelative( off_t relativeOffset ); 00058 virtual off_t tell() const { return mBufferFileOffset + mBufferOffset; } 00059 virtual off_t size() const; 00060 00061 virtual bool isEof() const; 00062 00063 std::string getUser() const { return mUser; } 00064 std::string getPassword() const { return mPassword; } 00065 long getResponseCode() const; 00066 std::string getEffectiveUrl() const; 00067 00068 00069 protected: 00070 IStreamUrl( const std::string &url, const std::string &user, const std::string &password ); 00071 00072 virtual void IORead( void *t, size_t size ); 00073 virtual void IOWrite( const void *t, size_t size ) {} 00074 00075 int bufferRemaining() const { return mBufferedBytes - mBufferOffset; } 00076 void fillBuffer( int wantBytes ) const; 00077 00078 static size_t writeCallback( char *buffer, size_t size, size_t nitems, void *userp ); 00079 00080 private: 00081 CURL *mCurl; 00082 CURLM *mMulti; 00083 const std::string mUser, mPassword; 00084 std::string mUserColonPassword; 00085 00086 mutable int still_running; // Is background url fetch still in progress 00087 mutable bool mStartedRead; 00088 00089 mutable off_t mSize; 00090 mutable bool mSizeCached; 00091 mutable long mResponseCode; 00092 mutable char *mEffectiveUrl; 00093 00094 mutable uint8_t *mBuffer; 00095 mutable int mBufferSize; 00096 mutable int mBufferOffset, mBufferedBytes; 00097 mutable off_t mBufferFileOffset; // where in the file the buffer starts 00098 static const int DEFAULT_BUFFER_SIZE = 4096; 00099 }; 00100 00101 IStreamUrlRef loadUrlStream( const Url &url ); 00102 IStreamUrlRef loadUrlStream( const std::string &url, const std::string &user = "", const std::string &password = "" ); 00103 00104 } // namespace cinder