HTTP上传和下载文件
在PC机和WCE上均能使用，使用的是MFC的库，已通过测试，记得加头文件#include<afxinet.h>
下载文件：
代码
const CString & strFileLocalFullPath) // 存放到本地的路径
{
ASSERT(strFileURLInServer != "");
ASSERT(strFileLocalFullPath != "");
CInternetSession session;
CHttpConnection* pHttpConnection = NULL;
CHttpFile* pHttpFile = NULL;
CString strServer, strObject;
INTERNET_PORT wPort;
DWORD dwType;
const int nTimeOut = 2000;
session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut); //重试之间的等待延时
session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试次数
char* pszBuffer = NULL;
try
{
AfxParseURL(strFileURLInServer, dwType, strServer, strObject, wPort);
pHttpConnection = session.GetHttpConnection(strServer, wPort);
pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject);
if(pHttpFile->SendRequest() == FALSE)
return false;
DWORD dwStateCode;
pHttpFile->QueryInfoStatusCode(dwStateCode);
if(dwStateCode == HTTP_STATUS_OK)
{
HANDLE hFile = CreateFile(strFileLocalFullPath, GENERIC_WRITE,
FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
NULL); //创建本地文件
if(hFile == INVALID_HANDLE_VALUE)
{
pHttpFile->Close();
pHttpConnection->Close();
session.Close();
return false;
}
char szInfoBuffer[1000]; //返回消息
DWORD dwFileSize = 0; //文件长度
DWORD dwInfoBufferSize = sizeof(szInfoBuffer);
BOOL bResult = FALSE;
bResult = pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH,
(void*)szInfoBuffer,&dwInfoBufferSize,NULL);
dwFileSize = atoi(szInfoBuffer);
const int BUFFER_LENGTH = 1024 * 10;
pszBuffer = new char[BUFFER_LENGTH]; //读取文件的缓冲
DWORD dwWrite, dwTotalWrite;
dwWrite = dwTotalWrite = 0;
UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); //读取服务器上数据
while(nRead > 0)
{
WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL); //写到本地文件
dwTotalWrite += dwWrite;
nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH);
}
delete[]pszBuffer;
pszBuffer = NULL;
CloseHandle(hFile);
}
}
catch(CInternetException* e)
{
TCHAR tszErrString[256];
e->GetErrorMessage(tszErrString, sizeof(tszErrString));
TRACE(_T("Download XSL error! URL: %s,Error: %s"), strFileURLInServer, tszErrString);
e->Delete();
}
catch(...)
{
}
if(pszBuffer != NULL)
{
delete[]pszBuffer;
pszBuffer = NULL;
}
if(pHttpFile != NULL)
{
pHttpFile->Close();
delete pHttpFile;
pHttpFile = NULL;
}
if(pHttpConnection != NULL)
{
pHttpConnection->Close();
delete pHttpConnection;
pHttpConnection = NULL;
}
session.Close();
return true;
}
测试代码：
2 CString LocalFullPath;
3 URLInServer = "http://www.163.com/photo";
4 LocalFullPath = "\\test.html";
5 Download(URLInServer,LocalFullPath);
修改后，代码
代码
2 const string & strFileLocalFullPath) // 存放到本地的路径
3 {
4 ASSERT(strFileURLInServer != "");
5 ASSERT(strFileLocalFullPath != "");
6 CInternetSession session;
7 CHttpConnection* pHttpConnection = NULL;
8 CHttpFile* pHttpFile = NULL;
9 CString strServer, strObject;
10 INTERNET_PORT wPort;
11
12 DWORD dwType;
13 const int nTimeOut = 2000;
14 session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut); //重试之间的等待延时
15 session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试次数
16 char* pszBuffer = NULL;
17
18 try
19 {
20 CString tmp;
21 tmp.Format("%s",strFileURLInServer.c_str());
22 AfxParseURL(tmp, dwType, strServer, strObject, wPort);
23 pHttpConnection = session.GetHttpConnection(strServer, wPort);
24 pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject);
25 if(pHttpFile->SendRequest() == FALSE)
26 return false;
27 DWORD dwStateCode;
28
29 pHttpFile->QueryInfoStatusCode(dwStateCode);
30 if(dwStateCode == HTTP_STATUS_OK)
31 {
32 //CString LocalFullPath;
33 tmp.Format("%s",strFileLocalFullPath.c_str());
34 HANDLE hFile = CreateFile(tmp, GENERIC_WRITE,
35 FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
36 NULL); //创建本地文件
37 if(hFile == INVALID_HANDLE_VALUE)
38 {
39 pHttpFile->Close();
40 pHttpConnection->Close();
41 session.Close();
42 return false;
43 }
44
45 char szInfoBuffer[1000]; //返回消息
46 DWORD dwFileSize = 0; //文件长度
47 DWORD dwInfoBufferSize = sizeof(szInfoBuffer);
48 BOOL bResult = FALSE;
49 bResult = pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH,
50 (void*)szInfoBuffer,&dwInfoBufferSize,NULL);
51
52 dwFileSize = atoi(szInfoBuffer);
53 const int BUFFER_LENGTH = 1024 * 10;
54 pszBuffer = new char[BUFFER_LENGTH]; //读取文件的缓冲
55 DWORD dwWrite, dwTotalWrite;
56 dwWrite = dwTotalWrite = 0;
57 UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); //读取服务器上数据
58
59 while(nRead > 0)
60 {
61 WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL); //写到本地文件
62 dwTotalWrite += dwWrite;
63 nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH);
64 }
65
66 delete[]pszBuffer;
67 pszBuffer = NULL;
68 CloseHandle(hFile);
69 }
70 else
71 {
72 delete[]pszBuffer;
73 pszBuffer = NULL;
74 if(pHttpFile != NULL)
75 {
76 pHttpFile->Close();
77 delete pHttpFile;
78 pHttpFile = NULL;
79 }
80 if(pHttpConnection != NULL)
81 {
82 pHttpConnection->Close();
83 delete pHttpConnection;
84 pHttpConnection = NULL;
85 }
86 session.Close();
87 return false;
88 }
89 }
90 catch(...)
91 {
92 delete[]pszBuffer;
93 pszBuffer = NULL;
94 if(pHttpFile != NULL)
95 {
96 pHttpFile->Close();
97 delete pHttpFile;
98 pHttpFile = NULL;
99 }
100 if(pHttpConnection != NULL)
101 {
102 pHttpConnection->Close();
103 delete pHttpConnection;
104 pHttpConnection = NULL;
105 }
106 session.Close();
107 return false;
108 }
109
110 if(pHttpFile != NULL)
111 {
112 pHttpFile->Close();
113 delete pHttpFile;
114 pHttpFile = NULL;
115 }
116 if(pHttpConnection != NULL)
117 {
118 pHttpConnection->Close();
119 delete pHttpConnection;
120 pHttpConnection = NULL;
121 }
122 session.Close();
123 return true;
124 }
125
上传文件：
代码
LPCTSTR strLocalFileName) //待上传的本地文件路径
{
ASSERT(strURL != NULL && strLocalFileName != NULL);
BOOL bResult = FALSE;
DWORD dwType = 0;
CString strServer;
CString strObject;
INTERNET_PORT wPort = 0;
DWORD dwFileLength = 0;
char * pFileBuff = NULL;
CHttpConnection * pHC = NULL;
CHttpFile * pHF = NULL;
CInternetSession cis;
bResult = AfxParseURL(strURL, dwType, strServer, strObject, wPort);
if(!bResult)
return FALSE;
CFile file;
try
{
if(!file.Open(strLocalFileName, CFile::shareDenyNone | CFile::modeRead))
return FALSE;
dwFileLength = file.GetLength();
if(dwFileLength <= 0)
return FALSE;
pFileBuff = new char[dwFileLength];
memset(pFileBuff, 0, sizeof(char) * dwFileLength);
file.Read(pFileBuff, dwFileLength);
const int nTimeOut = 5000;
cis.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut); //联接超时设置
cis.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试1次
pHC = cis.GetHttpConnection(strServer, wPort); //取得一个Http联接
pHF = pHC->OpenRequest(CHttpConnection::HTTP_VERB_POST, strObject);
if(!pHF->SendRequest(NULL, 0, pFileBuff, dwFileLength))
{
delete[]pFileBuff;
pFileBuff = NULL;
pHF->Close();
pHC->Close();
cis.Close();
return FALSE;
}
DWORD dwStateCode = 0;
pHF->QueryInfoStatusCode(dwStateCode);
if(dwStateCode == HTTP_STATUS_OK)
bResult = TRUE;
}
catch(CInternetException * pEx)
{
char sz[256] = "";
pEx->GetErrorMessage(sz, 25);
CString str;
str.Format("InternetException occur!\r\n%s", sz);
AfxMessageBox(str);
}
catch(CFileException& fe)
{
CString str;
str.Format("FileException occur!\r\n%d", fe.m_lOsError);
AfxMessageBox(str);
}
catch(...)
{
DWORD dwError = GetLastError();
CString str;
str.Format("Unknow Exception occur!\r\n%d", dwError);
AfxMessageBox(str);
}
delete[]pFileBuff;
pFileBuff = NULL;
file.Close();
pHF->Close();
pHC->Close();
cis.Close();
return bResult;
}
