willcool4ever • C语言开发CGI

//get.c
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
        char *data;
        char a[10],b[10];
        printf("Content-Type:text/html\n\n");
        printf("<HTML>\n");
        printf("<HEAD>\n<TITLE >Get Method</TITLE>\n</HEAD>\n");
        printf("<BODY>");
        printf("<div style=\"font-size:12px\">\n");
        data = getenv("QUERY_STRING");
        if(sscanf(data,"a=%[^&]&b=%s",a,b)!=2){
                printf("<DIV STYLE=\"COLOR:RED\">Error parameters should be entered!</DIV>\n");
        }
        else{
               printf("<DIV STYLE=\"COLOR:GREEN; font-size:15px;font-weight:bold\">a + b = %d</DIV>\n",atoi(a)+atoi(b));
        }
        printf("<HR COLOR=\"blue\" align=\"left\" width=\"100\">");
    printf("<input type=\"button\" value=\"Back CGI\" onclick=\"javascript:window.location='/'\">");
        printf("\n");
        printf("</BODY>\n");
        printf("</HTML>\n");
        return 0;
}

//post.c
#include <stdio.h>
#include <stdlib.h>
int main(void){
        int len;
        char *lenstr,poststr[20];
        char m[10],n[10];
        printf("Content-Type:text/html\n\n");
        printf("<HTML>\n");
        printf("<HEAD>\n<TITLE >post Method</TITLE>\n</HEAD>\n");
        printf("<BODY>\n");
        printf("<div style= \"font-size:12px\">\n");
        lenstr=getenv("CONTENT_LENGTH");
        if(lenstr == NULL)
                printf("<DIV STYLE=\"COLOR:RED\">Error parameters should be entered!</DIV>\n");
        else{
                len=atoi(lenstr);
                fgets(poststr,len+1,stdin);
                if(sscanf(poststr,"m=%[^&]&n=%s",m,n)!=2){
                        printf("<DIV STYLE=\"COLOR:RED\">Error: Parameters are not right!</DIV>\n");
                }
                else{
                       printf("<DIV STYLE=\"COLOR:GREEN; font-size:15px;font-weight:bold\">m * n = %d</DIV>\n",atoi(m)*atoi(n));
                }
        }
        printf("<HR COLOR=\"blue\" align=\"left\" width=\"100\">");
        printf("<input type=\"button\" value=\"Back CGI\" onclick=\"javascript:window.location='/'\">");
        printf("\n");
        printf("</BODY>\n");
        printf("</HTML>\n");
        fflush(stdout);
        return 0;
}

<!--html测试部分-->
<html>
<head>
<title>CGI Testing</title>
</head>
<body>
<table width="200" height="180" border="0" style="font-size:12px">
<tr><td>
<div style="font-weight:bold; font-size:15px">Method: GET
<div>please input two number:<div>
<form method="get" action="/cgi-bin/get.cgi">
<input type="txt" size="3" name="a">+
<input type="txt" size="3" name="b">=
<input type="submit" value="sum">
</form>
</td></tr>
<tr><td>
<div style="font-weight:bold; font-size:15px">Method: POST
<div>please input two number:<div>
<form method="post" action="/cgi-bin/post.cgi">
<input type="txt" size="3" name="m">*
<input type="txt" size="3" name="n">=
<input type="submit" value="resu">
</form>
</td></tr>
<tr><td><inputtype="button" value="Back Home"onclick='javascript:window.location="./index.html"'></td></tr>
</table>
</body>
</html>