Diff: services/http/client/data/HTTPFile.cpp

Revision:

0:e614f7875b60

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/http/client/data/HTTPFile.cpp	Sat Jun 12 06:01:50 2010 +0000
@@ -0,0 +1,124 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "HTTPFile.h"
+
+HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false)
+{
+
+}
+
+HTTPFile::~HTTPFile()
+{
+  closeFile();
+}
+
+void HTTPFile::clear()
+{
+  closeFile();
+  //Force reopening
+}
+
+int HTTPFile::read(char* buf, int len)
+{
+  if(!openFile("r")) //File does not exist, or I/O error...
+    return 0;
+  len = fread(buf, 1, len, m_fp);
+  if( feof(m_fp) )
+  {
+    //File read completely, we can close it
+    closeFile();
+  }
+  return len;
+}
+
+int HTTPFile::write(const char* buf, int len)
+{
+  if(!openFile("w")) //File does not exist, or I/O error...
+    return 0;
+  len = fwrite(buf, 1, len, m_fp);
+  if( (!m_chunked && (ftell(m_fp) >= m_len)) ||
+      (m_chunked && !len) )
+  {
+    //File received completely, we can close it
+    closeFile();
+  }
+  return len;
+}
+  
+string HTTPFile::getDataType() //Internet media type for Content-Type header
+{
+  return ""; //Unknown
+}
+
+void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header
+{
+  //Do not really care here
+}
+
+bool HTTPFile::getIsChunked() //For Transfer-Encoding header
+{
+  return false;
+}
+
+void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header
+{
+  m_chunked = chunked;
+}
+  
+int HTTPFile::getDataLen() //For Content-Length header
+{
+  return m_len;
+}
+
+void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length
+{
+  if(!m_chunked)
+    m_len = len; //Useful so that we can close file when last byte is written
+}
+
+bool HTTPFile::openFile(const char* mode) //true on success, false otherwise
+{
+  if(m_fp) 
+    return true;
+  
+  m_fp = fopen(m_path.c_str(), mode);
+  if(m_fp && mode[0]=='r')
+  {
+    //Seek EOF to get length
+    fseek(m_fp, 0, SEEK_END);
+    m_len = ftell(m_fp);
+    fseek(m_fp, 0, SEEK_SET); //Goto SOF
+  }
+  
+  if(!m_fp) 
+    return false;
+    
+  return true;
+}
+
+void HTTPFile::closeFile()
+{
+  if(m_fp)
+    fclose(m_fp);
+}