| 1 | /**
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| 2 | * CRXProxy.cpp
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| 3 | */
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| 4 |
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| 5 | #include "CRXSocket.h"
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| 6 | #include "CRXHttpRequest.h"
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| 7 | #include "CRXHttpResponse.h"
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| 8 |
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| 9 | #include "CRXProxy.h"
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| 10 |
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| 11 | #include <string.h>
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| 12 |
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| 13 | #ifdef _DEBUG
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| 14 | # include <iostream>
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| 15 | using namespace std;
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| 16 | # define PRINT_ERROR cout
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| 17 | #else
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| 18 | # define PRINT_ERROR
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| 19 | #endif
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| 20 |
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| 21 | #ifdef _WIN32
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| 22 | # include <Windows.h>
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| 23 | # define THREAD_TYPE void *
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| 24 | # define THREAD_FUNCTION_RETURN DWORD
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| 25 | # define THREAD_FUNCTION_CALLING_CONVENTION WINAPI
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| 26 | #else
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| 27 | # define THREAD_TYPE pthread_t
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| 28 | # define THREAD_FUNCTION_RETURN void *
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| 29 | # define THREAD_FUNCTION_CALLING_CONVENTION
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| 30 | #endif
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| 31 |
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| 32 | THREAD_FUNCTION_RETURN
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| 33 | THREAD_FUNCTION_CALLING_CONVENTION
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| 34 | CRXProxyWrapper (void * aThreadArg)
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| 35 | {
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| 36 | int aResult = 0;
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| 37 | CRXProxy * aProxy = (CRXProxy *) aThreadArg;
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| 38 |
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| 39 | aResult = aProxy->Forward ();
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| 40 | if (aResult)
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| 41 | PRINT_ERROR << aProxy->GetErrorMessage ();
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| 42 |
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| 43 | return (THREAD_FUNCTION_RETURN)0;
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| 44 | }
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| 45 |
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| 46 | CRXProxy::CRXProxy (const int aSocket)
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| 47 | {
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| 48 | /*----------------------------------------------------------------*/
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| 49 | mClient = aSocket;
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| 50 | /*----------------------------------------------------------------*/
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| 51 | }
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| 52 |
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| 53 | int
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| 54 | CRXProxy::ForwardMT (void)
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| 55 | {
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| 56 | THREAD_TYPE aThreadID = (THREAD_TYPE)0;
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| 57 | /*----------------------------------------------------------------*/
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| 58 | #ifdef _WIN32
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| 59 | aThreadID = CreateThread (0, 0, CRXProxyWrapper, this, 0, 0);
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| 60 | if (aThreadID == NULL)
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| 61 | {
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| 62 | return -1;
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| 63 | }
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| 64 |
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| 65 | return 0;
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| 66 | #else
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| 67 | return pthread_create (&aThreadID, NULL, CRXProxyWrapper, this);
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| 68 | #endif
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| 69 | /*----------------------------------------------------------------*/
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| 70 | }
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| 71 |
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| 72 | int
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| 73 | CRXProxy::Forward (void)
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| 74 | {
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| 75 | int aResult = 0;
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| 76 | int aReceivedSize = 0;
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| 77 |
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| 78 | const unsigned int aBufferSize = 1024 * 16;
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| 79 | char aBuffer[aBufferSize] = {0x00, };
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| 80 |
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| 81 | CRXHttpRequest aHttpRequest;
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| 82 |
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| 83 | CRXSocket aWebServer;
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| 84 |
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| 85 | bool aIsMoreRequest = false;
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| 86 |
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| 87 | /*----------------------------------------------------------------*/
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| 88 | do
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| 89 | {
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| 90 | /* BROWSER --- request ---> [PROXY] SERVER */
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| 91 | aResult = mClient.Receive (aBuffer, aBufferSize);
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| 92 | if (aResult < 0)
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| 93 | {
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| 94 | CRX_ERROR_ADD (mClient.GetErrorMessage ().c_str ());
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| 95 | CRX_ERROR (aResult, "failed to receive from browser");
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| 96 | break;
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| 97 | }
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| 98 | aReceivedSize = aResult;
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| 99 |
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| 100 | /* BROWSER ?--- waiting --- [PROXY] --- connect ---> SERVER */
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| 101 | if (!aWebServer)
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| 102 | {
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| 103 | /* parse http request */
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| 104 | aHttpRequest = aBuffer;
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| 105 |
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| 106 | /* connect */
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| 107 | aResult = aWebServer.Connect (aHttpRequest.GetHost (), aHttpRequest.GetPort (), 1);
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| 108 | if (aResult < 0)
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| 109 | {
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| 110 | CRX_ERROR_ADD (aWebServer.GetErrorMessage ().c_str ());
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| 111 | CRX_ERROR (aResult, "failed to connect to server <%s>", aHttpRequest.GetURL ().c_str ());
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| 112 | return aResult;
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| 113 | }
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| 114 | }
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| 115 |
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| 116 | /* BROWSER ?--- waiting --- [PROXY] --- request ---> SERVER */
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| 117 | aResult = aWebServer.Send (aBuffer, aReceivedSize);
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| 118 | if (aResult != aReceivedSize)
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| 119 | {
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| 120 | CRX_ERROR_ADD (aWebServer.GetErrorMessage ().c_str ());
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| 121 | CRX_ERROR (aResult, "failed to send to server <%s>", aHttpRequest.GetURL ().c_str ());
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| 122 | return aResult;
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| 123 | }
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| 124 |
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| 125 | /* BROWSER <--- response--- [PROXY] <--- response--- SERVER */
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| 126 | for (;;)
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| 127 | {
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| 128 | memset (aBuffer, 0x00, aBufferSize);
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| 129 |
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| 130 | aResult = aWebServer.Receive (aBuffer, aBufferSize);
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| 131 | if (aResult < 0)
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| 132 | {
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| 133 | CRX_ERROR_ADD (aWebServer.GetErrorMessage ().c_str ());
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| 134 | CRX_ERROR (aResult, "failed to receive <%s>", aHttpRequest.GetURL ().c_str ());
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| 135 | break;
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| 136 | }
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| 137 | else if (aResult == 0)
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| 138 | {
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| 139 | break;
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| 140 | }
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| 141 | aReceivedSize = aResult;
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| 142 |
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| 143 | aResult = mClient.Send (aBuffer, aReceivedSize);
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| 144 | if (aResult != aReceivedSize)
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| 145 | {
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| 146 | CRX_ERROR_ADD (mClient.GetErrorMessage ().c_str ());
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| 147 | CRX_ERROR (aResult, "failed to send <%s>", aHttpRequest.GetURL ().c_str ());
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| 148 | break;
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| 149 | }
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| 150 | }
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| 151 | } while (aIsMoreRequest);
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| 152 |
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| 153 | /*----------------------------------------------------------------*/
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| 154 | mClient.Close ();
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| 155 | aWebServer.Close ();
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| 156 |
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| 157 | return aResult;
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| 158 | }
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