如何使用c语言解析httppost请求

头文件

#ifndef _UPLOAD#define _UPLOAD#include "fastcgi/fcgiapp.h"//#include "sysinc.h"#ifdef _WIN32/*! \def GRCALL*  the calling convention of functions exported by modules.*/#define GRCALL __stdcall#define GRINLINE __inline#else#define GRINLINE inline/*! \def GRCALL*  the calling convention of functions exported by modules.*/#if defined(__CYGWIN__)#define GRCALL __stdcall#else#define __stdcall#define GRCALL#endif#endif#define EUPLOAD_SUCCESS 0 #define EUPLOAD_NO_DATA -1#define EUPLOAD_READ    -2#define EUPLOAD_WRITE   -3#ifdef __cpluscplusextern "C" {#endifint GRCALL upload_file_save_as(FCGX_Stream* in,FCGX_Stream* out, FCGX_ParamArray envp,const char *save_path,char(* filePath)[260]);int GRCALL upload_file_save_as(const char *save_path);#ifdef __cpluscplus}#endif#endif

cpp

#include "stdafx.h"#include "fastcgi/upload.h"//#include "logger.h"#include "fastcgi/fcgi_stdio.h"#include "string.h"#include <stdlib.h>#include <windows.h>#define DEAL_BUF_LEN 1024#define SIGN_CODE_LEN 100#define FILE_NAME_LEN 64enum{    STATE_START,    STATE_GET_SIGN_CODE,    STATE_GET_FILE_NAME,    STATE_GET_FILE_START,    STATE_GET_FILE_CONTENT,    STATE_CHECK_END,    STATE_END};int GRCALL upload_file_save_as(FCGX_Stream* in, FCGX_Stream* out, FCGX_ParamArray envp, const char *saveas,char(* saveName)[260]){FILE *fp=NULL;int getState = STATE_START;// uploaded file content length int contentLength;int nowReadLen;int signCodeLen;int tmpLen;char *nowReadP;char *nowWriteP = NULL;char dealBuf[DEAL_BUF_LEN];// http boundary char signCode[SIGN_CODE_LEN];char tmpSignCode[SIGN_CODE_LEN];char fileName[FILE_NAME_LEN];memset(dealBuf, '0', DEAL_BUF_LEN);memset(signCode, '0', SIGN_CODE_LEN);memset(fileName, '0', FILE_NAME_LEN);nowReadLen = 0;int fileNum = 0;//SYSTEMTIME sys;//GetLocalTime(&sys);//FCGX_FPrintF(out, " before 1:  %02d:%02d.%03d 星期%1d ",  sys.wMinute, sys.wSecond, sys.wMilliseconds, sys.wDayOfWeek);if ((char *)FCGX_GetParam("CONTENT_LENGTH", envp) != NULL){contentLength = atoi((char *)FCGX_GetParam("CONTENT_LENGTH", envp));FCGX_FPrintF(out, "CONTENT_LENGTH %d \n", contentLength);}else{FCGX_FPrintF(out, "EUPLOAD_NO_DATA\n");return EUPLOAD_NO_DATA;}while (contentLength > 0){if (contentLength >= DEAL_BUF_LEN){nowReadLen = DEAL_BUF_LEN;}else{nowReadLen = contentLength;}contentLength -= nowReadLen;//if (FCGI_fread(dealBuf, sizeof(char), nowReadLen, FCGI_stdin) != (size_t)nowReadLen)if (FCGX_GetStr(dealBuf, nowReadLen, in) != (size_t)nowReadLen){//log_error("read error %d", nowReadLen);FCGX_FPrintF(out, "read error %d \n", nowReadLen);FCGX_FPrintF(out, "actual read %d \n", fread(dealBuf, sizeof(char), nowReadLen, FCGI_stdin));return EUPLOAD_READ;}nowReadP = dealBuf;//FCGX_FPrintF(out, "content is %s \n", dealBuf);/*while (nowReadLen > 0){FCGX_FPrintF(out, "%c \n", *nowReadP);nowReadP++;nowReadLen--;}*/while  (nowReadLen > 0){switch (getState){case STATE_START:nowWriteP = signCode;getState = STATE_GET_SIGN_CODE;case STATE_GET_SIGN_CODE:if (strncmp(nowReadP, "\r\n", 2) == 0){//FCGX_FPrintF(out, "## signCode is %s", signCode);signCodeLen = nowWriteP - signCode;//FCGX_FPrintF(out, "## signCode LENGTH is %d", signCodeLen);nowReadP++;nowReadLen--;*nowWriteP = 0;getState = STATE_GET_FILE_NAME;}else{*nowWriteP = *nowReadP;nowWriteP++;}break;case STATE_GET_FILE_NAME:if (strncmp(nowReadP, "filename=", strlen("filename=")) == 0){nowReadP += strlen("filename=");nowReadLen -= strlen("filename=");nowWriteP = fileName + strlen(saveas);memset(fileName, '0', FILE_NAME_LEN);while (*nowReadP != '\r'){if (*nowReadP == '\\' || *nowReadP == '/'){nowWriteP = fileName + strlen(saveas);}else if (*nowReadP != '\"'){*nowWriteP = *nowReadP;nowWriteP++;}nowReadP++;nowReadLen--;if (nowReadLen <= 0)break;}*nowWriteP = 0;nowReadP++;nowReadLen--;getState = STATE_GET_FILE_START;memcpy(fileName, saveas, strlen(saveas));//if (fileNum > 1)fileNum = 1;sprintf(saveName[fileNum], "%s",fileName);//FCGX_FPrintF(out, "open file %s ", fileName);if ((fp = fopen(fileName, "wb")) == NULL){//log_error("open file %s error %d", fileName, errno);FCGX_FPrintF(out, "open file %s error %d", fileName, errno);return EUPLOAD_WRITE;}else{fileNum++;}}break;case STATE_GET_FILE_START:if (strncmp(nowReadP, "\r\n\r\n", 4) == 0){nowReadP += 3;nowReadLen -= 3;getState = STATE_GET_FILE_CONTENT;}break;case STATE_GET_FILE_CONTENT:if (*nowReadP != '\r'){//fputc(*nowReadP, fp);fwrite(nowReadP, sizeof(char), 1, fp);}else{if (nowReadLen >= (signCodeLen + 2)) //\r\n=2{if (strncmp(nowReadP + 2, signCode, signCodeLen) == 0){//FCGX_FPrintF(out, "STATE_GET_FILE_CONTENT and end:%d ,signCodeLen is %d ", nowReadLen, signCodeLen);//FCGX_FPrintF(out, "nowReadp: %c  ", *(nowReadP + 2 + signCodeLen));//FCGX_FPrintF(out, "nowReadp: %c  ", *(nowReadP + 2 + signCodeLen+1));//FCGX_FPrintF(out, "nowReadp: %c  ", *(nowReadP + 2 + signCodeLen+2));//getState = STATE_END;//nowReadLen = 1;if (nowReadLen >= (signCodeLen + 4) && strncmp(nowReadP + 2 + signCodeLen, "--", 2) == 0)//真正的结尾{//FCGX_FPrintF(out, "## end ##  ");getState = STATE_END;nowReadLen = 1;}//else if(nowReadLen<(signCodeLen + 4) )//刚好到boundary后面的-未读到时,break//{//break;//}else{//FCGX_FPrintF(out, "try to close file and start another file");if (fp != NULL){FCGX_FPrintF(out, "close file and start another file");fclose(fp);fp = NULL;}getState = STATE_GET_FILE_NAME;//getState = STATE_START;//memset(signCode, 0, SIGN_CODE_LEN);//FCGX_FPrintF(out, "nowReadp ==r## and goto START");}//getState = STATE_END;//nowReadLen = 1;}else{//fputc(*nowReadP, fp);fwrite(nowReadP, sizeof(char), 1, fp);//FCGX_FPrintF(out, "%s", nowReadP);}}else{getState = STATE_CHECK_END;nowWriteP = tmpSignCode;*nowWriteP = *nowReadP;nowWriteP++;tmpLen = 1;//FCGX_FPrintF(out, "check end nowRadp ==r##");}}break;case STATE_CHECK_END:if (*nowReadP != '\r'){if (tmpLen < signCodeLen + 2){*nowWriteP = *nowReadP;nowWriteP++;tmpLen++;if (tmpLen == signCodeLen + 2){*nowWriteP = 0;//FCGX_FPrintF(out, "tmpSignCode is %s \n", tmpSignCode);if ((tmpSignCode[1] == '\n') && (strncmp(tmpSignCode + 2, signCode, signCodeLen) == 0)){/*FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %02x  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %02x  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);    getState = STATE_END;nowReadLen = 1;*//*FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %02x  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %02x  ", *nowReadP);nowReadP++;FCGX_FPrintF(out, "nowReadp: %c  ", *nowReadP);nowReadP -=3;*/nowReadP++;nowReadLen--;//if (nowReadLen >= (signCodeLen + 4) && strncmp(nowReadP + 2 + signCodeLen, "--", 2) == 0)//真正的结尾if (nowReadLen >= 2 && strncmp(nowReadP, "--", 2) == 0){//FCGX_FPrintF(out, "nowReadp ==r## and goto END");//FCGX_FPrintF(out, "### check end,signCodeLen: %d,nowReadLen:%d", signCodeLen, nowReadLen);getState = STATE_END;nowReadLen = 1;}//else if(nowReadLen<2)//刚好到boundary后面的--未读到时,break//{//break;//}else{if (fp != NULL){try {FCGX_FPrintF(out, "close file checkend");fclose(fp);}catch (...) {}}getState = STATE_GET_FILE_NAME;//getState = STATE_START;//memset(signCode, 0, SIGN_CODE_LEN);//FCGX_FPrintF(out, "nowReadp ==r## and goto START");}//getState = STATE_END;//nowReadLen = 1;}else{//fprintf(fp,tmpSignCode);fwrite(tmpSignCode, sizeof(char), tmpLen, fp);getState = STATE_GET_FILE_CONTENT;//FCGX_FPrintF(out, "check end and get fileContent,tempSignCode: %s", tmpSignCode);//FCGX_FPrintF(out, "checkend and not end \n");}}}}else{*nowWriteP = 0;//fprintf(fp,tmpSignCode);fwrite(tmpSignCode, sizeof(char), tmpLen, fp);nowWriteP = tmpSignCode;*nowWriteP = *nowReadP;nowWriteP++;tmpLen = 1;FCGX_FPrintF(out, "checkend and nowReadP == r \n");}break;case STATE_END:nowReadLen = 1;//FCGX_FPrintF(out, "state  end \n");break;default:break;}if (getState != STATE_START){nowReadLen--;nowReadP++;}else{nowReadLen-=2;nowReadP+=2;}}}//add for two picture by luodaliangif (fp != NULL){FCGX_FPrintF(out, "close file end");fclose(fp);}//GetLocalTime(&sys);//FCGX_FPrintF(out, " before 5:  %02d:%02d.%03d 星期%1d ", sys.wMinute, sys.wSecond, sys.wMilliseconds, sys.wDayOfWeek);return EUPLOAD_SUCCESS;}