一个简单的浏览器端CGI调用

共3个文件

html：2个

c：1个

(POST/GET）

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cgitest.zip （3个子文件）

cgitest.html 801B

test

cgitest.html 739B

cgitest.c 2KB

#include <stdio.h> #include <stdlib.h> #include <string.h> int main( int argc, char *argv[] ) { char *UserInput = NULL; // index the user input data. char *request_method = NULL; //index the html transfer type. int data_len = 0; // index the input data's length. printf("Content-type:text/html;charset=utf-8%d%d", 10, 10); //response header. printf("\n"); // HTML page header. printf("<html><head>"); printf("<title>%s</title></head>", "CGI Test"); printf("<body>"); if( ! getenv("REQUEST_METHOD") ) { printf("No client request from user !\n"); return -1; } request_method = getenv("REQUEST_METHOD"); // trans-type. // trans-type : GET if( ! strcmp( request_method, "GET" ) ) { if( getenv( "QUERY_STRING" ) ) { UserInput = getenv( "QUERY_STRING" ); } data_len = strlen( UserInput ); if( NULL == UserInput || 0 == data_len ) { printf( "There's no input data !\n" ); return -1; } UserInput[data_len] = '\0'; printf("method = %s, data_len = %d<br>", request_method, data_len); printf("Form data: %s", UserInput); } // trans-type : POST else if( ! strcmp( request_method, "POST" ) ) { if( getenv( "CONTENT_LENGTH" ) ) // the real length of input data. data_len = atoi( getenv( "CONTENT_LENGTH" ) ); if( 0 == data_len ) { printf( "There's no input data !\n" ); return -1; } UserInput = (char *)malloc( sizeof(char) * (data_len + 1) ); if( NULL == UserInput ) { perror( "malloc for 'UserInput'" ); UserInput = NULL; return -1; } if( fread( UserInput, sizeof(char), data_len, stdin ) <= 0 ) { perror("fread input data"); return -1; } UserInput[data_len] = '\0'; printf("method = %s, data_len = %d<br>", request_method, data_len); printf("<br>Form data:<br> %s", UserInput); free( UserInput ); UserInput = NULL; } printf("</body></html>"); fflush( stdout ); return 0; }

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