读取后 进行字符串分割
Http访问有两种方式，GET和POST，就编程来说GET方式相对简单点，它不用向服务器提交数据，程序中使用POST方式，
提交数据并从服务器获取返回值。
为实现Http访问，微软提供了二套API：WinINet, WinHTTP。WinHTTP比WinINet更加安全和健壮，可以这么认为WinHTTP是WinINet的升级版本。
程序中，通过一个宏的设置来决定是使用WinHttp还是WinINet。
#define USE_WINHTTP //Comment this line to user wininet.
下面来说说实现Http访问的流程（两套API都一样的流程）：
1， 首先我们打开一个Session获得一个HINTERNET session句柄；
2， 然后我们使用这个session句柄与服务器连接得到一个HINTERNET connect句柄；
3， 然后我们使用这个connect句柄来打开Http 请求得到一个HINTERNET request句柄；
4， 这时我们就可以使用这个request句柄来发送数据与读取从服务器返回的数据；
5， 最后依次关闭request，connect，session句柄。
/***********************定义HTTP发送所用方法***********************************/
HINTERNET OpenSession(LPCWSTR userAgent = 0)
{
#ifdef USE_WINHTTP
return WinHttpOpen(userAgent, NULL, NULL, NULL, NULL)
#else
return InternetOpen(userAgent, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0)
#endif
}
HINTERNET Connect(HINTERNET hSession, LPCWSTR serverAddr, int portNo)
{
#ifdef USE_WINHTTP
return WinHttpConnect(hSession, serverAddr, (INTERNET_PORT) portNo, 0)
#else
return InternetConnect(hSession, serverAddr, portNo, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0)
#endif
}
HINTERNET OpenRequest(HINTERNET hConnect, LPCWSTR verb, LPCWSTR objectName, int scheme)
{
DWORD flags = 0
#ifdef USE_WINHTTP
if (scheme == INTERNET_SCHEME_HTTPS) {
闷颂 flags |= WINHTTP_FLAG_SECURE
}
return WinHttpOpenRequest(hConnect, verb, objectName, NULL, NULL, NULL, flags)
#else
if 羡拍(scheme == INTERNET_SCHEME_HTTPS) {
flags |= INTERNET_FLAG_SECURE
}
return HttpOpenRequest(hConnect, verb, objectName, NULL, NULL, NULL, flags, 0)
#endif
}
BOOL AddRequestHeaders(HINTERNET hRequest, LPCWSTR header)
{
SIZE_T len = lstrlenW(header)
#ifdef USE_WINHTTP
蚂派郑 return WinHttpAddRequestHeaders(hRequest, header, DWORD(len), WINHTTP_ADDREQ_FLAG_ADD)
#else
return HttpAddRequestHeaders(hRequest, header, DWORD(len), HTTP_ADDREQ_FLAG_ADD)
#endif
}
BOOL SendRequest(HINTERNET hRequest, const void* body, DWORD size)
{
#ifdef USE_WINHTTP
return WinHttpSendRequest(hRequest, 0, 0, const_cast<void*>(body), size, size, 0)
#else
return HttpSendRequest(hRequest, 0, 0, const_cast<void*>(body), size)
#endif
}
BOOL EndRequest(HINTERNET hRequest)
{
#ifdef USE_WINHTTP
return WinHttpReceiveResponse(hRequest, 0)
#else
// if you use HttpSendRequestEx to send request then use HttpEndRequest in here!
return TRUE
#endif
}
BOOL QueryInfo(HINTERNET hRequest, int queryId, char* szBuf, DWORD* pdwSize)
{
#ifdef USE_WINHTTP
return WinHttpQueryHeaders(hRequest, (DWORD) queryId, 0, szBuf, pdwSize, 0)
#else
return HttpQueryInfo(hRequest, queryId, szBuf, pdwSize, 0)
#endif
}
BOOL ReadData(HINTERNET hRequest, void* buffer, DWORD length, DWORD* cbRead)
{
#ifdef USE_WINHTTP
return WinHttpReadData(hRequest, buffer, length, cbRead)
#else
return InternetReadFile(hRequest, buffer, length, cbRead)
#endif
}
void CloseInternetHandle(HINTERNET hInternet)
{
if (hInternet)
{
#ifdef USE_WINHTTP
WinHttpCloseHandle(hInternet)
#else
InternetCloseHandle(hInternet)
#endif
}
}
/**********************************************************/
///通过Http方式发送短信
string SendSMS_HTTP(const long ececcid,const string & password ,const string & msisdn, const string &smsContent)
{
string rtnStr ="-1"
HINTERNET hSession = 0
HINTERNET hConnect = 0
HINTERNET hRequest = 0
wstring strHeader(L"Content-type: application/x-www-form-urlencoded\r\n")
// Test data
CrackedUrl crackedUrl(L"http://pi.f3.cn/SendSMS.aspx")
string StrPostData = "ececcid=600000&password="+password+"&msisdn="+msisdn+"&smscontent="+smsContent+"&msgtype=5&longcode="
StrPostData = string_To_UTF8(StrPostData)
// Open session.
hSession = OpenSession(L"HttpPost by lyz_sea@163.com")
if (hSession == NULL) {
cout<<"Error:Open session!\n"
return "-1"
}
// Connect.
hConnect = Connect(hSession, crackedUrl.GetHostName(), crackedUrl.GetPort())
if (hConnect == NULL) {
cout<<"Error:Connect failed!\n"
return "-1"
}
// Open request.
hRequest = OpenRequest(hConnect, L"POST", crackedUrl.GetPath(), crackedUrl.GetScheme())
if (hRequest == NULL) {
cout<<"Error:OpenRequest failed!\n"
return "-1"
}
// Add request header.
if (!AddRequestHeaders(hRequest, strHeader.c_str())) {
cout<<"Error:AddRequestHeaders failed!\n"
return "-1"
}
// Send post data.
if (!SendRequest(hRequest, StrPostData.c_str(), StrPostData.length())) {
cout<<"Error:SendRequest failed!\n"
return "-1"
}
// End request
if (!EndRequest(hRequest)) {
cout<<"Error:EndRequest failed!\n"
return "-1"
}
char szBuf[BUF_SIZE]
DWORD dwSize = 0
szBuf[0] = 0
// Query header info.
#ifdef USE_WINHTTP
int contextLengthId = WINHTTP_QUERY_CONTENT_LENGTH
int statusCodeId = WINHTTP_QUERY_STATUS_CODE
int statusTextId = WINHTTP_QUERY_STATUS_TEXT
#else
int contextLengthId = HTTP_QUERY_CONTENT_LENGTH
int statusCodeId = HTTP_QUERY_STATUS_CODE
int statusTextId = HTTP_QUERY_STATUS_TEXT
#endif
dwSize = BUF_SIZE
if (QueryInfo(hRequest, contextLengthId, szBuf, &dwSize)) {
szBuf[dwSize] = 0
cout<<"Content length: "<<szBuf<<endl
}
dwSize = BUF_SIZE
if (QueryInfo(hRequest, statusCodeId, szBuf, &dwSize)) {
szBuf[dwSize] = 0
cout<<"Status code: "<< szBuf<<endl
}
dwSize = BUF_SIZE
if (QueryInfo(hRequest, statusTextId, szBuf, &dwSize)) {
szBuf[dwSize] = 0
cout<<"Status text:"<<szBuf<<endl
}
// read data.
for () {
dwSize = BUF_SIZE
if (ReadData(hRequest, szBuf, dwSize, &dwSize) == FALSE) {
break
}
if (dwSize <= 0) {
break
}
szBuf[dwSize] = 0
rtnStr =::UTF8_To_string(string(szBuf))
cout<<rtnStr<<endl//Output 返回值
}
CloseInternetHandle(hRequest)
CloseInternetHandle(hConnect)
CloseInternetHandle(hSession)
return rtnStr
}
以上方法中用到的CrackURL方法在以下CrackURL.h文件中：
#pragma once
//#include<iostream>
//using namespace std
#define USE_WINHTTP //Comment this line to user wininet.
#ifdef USE_WINHTTP
#include <winhttp.h>
#pragma comment(lib, "winhttp.lib")
#else
#include <wininet.h>
#pragma comment(lib, "wininet.lib")
#endif
// CrackedUrl
class CrackedUrl {
int m_scheme
wstring m_host
int m_port
wstring m_path
public:
CrackedUrl(LPCWSTR url)
{
URL_COMPONENTS uc = { 0}
uc.dwStructSize = sizeof(uc)
const DWORD BUF_LEN = 256
WCHAR host[BUF_LEN]
uc.lpszHostName = host
uc.dwHostNameLength = BUF_LEN
WCHAR path[BUF_LEN]
uc.lpszUrlPath = path
uc.dwUrlPathLength = BUF_LEN
WCHAR extra[BUF_LEN]
uc.lpszExtraInfo = extra
uc.dwExtraInfoLength = BUF_LEN
#ifdef USE_WINHTTP
if (!WinHttpCrackUrl(url, 0, ICU_ESCAPE, &uc)) {
cout<<"Error:WinHttpCrackUrl failed!\n"
}
#else
if (!InternetCrackUrl(url, 0, ICU_ESCAPE, &uc)) {
printf("Error:InternetCrackUrl failed!\n")
}
#endif
m_scheme = uc.nScheme
m_host = host
m_port = uc.nPort
m_path = path
}
int GetScheme() const
{
return m_scheme
}
LPCWSTR GetHostName() const
{
return m_host.c_str()
}
int GetPort() const
{
return m_port
}
LPCWSTR GetPath() const
{
return m_path.c_str()
}
static string UrlEncode(const char* p)
{
if (p == 0) {
return string()
}
string buf
for () {
int ch = (BYTE) (*(p++))
if (ch == '\0') {
break
}
if (isalnum(ch) || ch == '_' || ch == '-' || ch == '.') {
buf += (char)ch
}
else if (ch == ' ') {
buf += '+'
}
else {
char c[16]
wsprintfA(c, "%%%02X", ch)
buf += c
}
}
return buf
}
}
循环过余答种及结果的i值不同。看你for循环及中断中有没有更改或引用该i值。你同学说的对，DHT22传输一位时间仅几十us，就要求你的位接收及数据处理程序总的一竖搜慧个循环漏搭周期要小于DHT22位传输最小延时。你1mhz主频，还用for循环读取数据位，时间够呛。
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