cgi post method.c

来自「CGI Post方法测试」· C语言 代码 · 共 124 行

#include <stdio.h>
#include <stdlib.h>
#define MAX_ENTRIES 50
#define LF 10
#define CR 13


typedef struct {
char *name;
char *val;
} entry;

char *makeword(char *line, char stop);
char *fmakeword(FILE *f, char stop, int *len);
char x2c(char *what);
void unescape_url(char *url);
void plustospace(char *str);


main(int argc, char *argv[]) {
entry entries[MAX_ENTRIES];
register int x,m=0;
int cl;

printf("Content-type: text/html%c%c",10,10);

if(strcmp(getenv("REQUEST_METHOD"),"POST")) {
printf("This script should be referenced with a METHOD of POST.\n");
exit(1);
}
if(strcmp(getenv("CONTENT_TYPE"),"application/x-www-form-urlencoded")) {
printf("This script can only be used to decode form results. \n");
exit(1);
}
cl = atoi(getenv("CONTENT_LENGTH"));

for(x=0;cl && (!feof(stdin));x++) {
m=x;
entries[x].val = fmakeword(stdin,'&',&cl);
plustospace(entries[x].val);
unescape_url(entries[x].val);
entries[x].name = makeword(entries[x].val,'=');
}

printf("<H1>查 询 结 果</H1>");
printf("您 输 入 的 查 询 值 如 下 ∶ <p>%c",10);
printf("<ul>%c",10);

for(x=0; x <= m; x++)
printf("<li> <code>%s = %s</code>%c",entries[x].name,
entries[x].val,10);
printf("</ul>%c",10);

}

char *makeword(char *line, char stop) {
int x = 0,y;
char *word = (char *) malloc(sizeof(char) * (strlen(line) + 1));

for(x=0;((line[x]) && (line[x] != stop));x++)
word[x] = line[x];

word[x] = '\0';
if(line[x]) ++x;
y=0;

while(line[y++] = line[x++]);
return word;
}

char *fmakeword(FILE *f, char stop, int *cl) {
int wsize;
char *word;
int ll;

wsize = 102400;
ll=0;
word = (char *) malloc(sizeof(char) * (wsize + 1));

while(1) {
word[ll] = (char)fgetc(f);
if(ll==wsize) {
word[ll+1] = '\0';
wsize+=102400;
word = (char *)realloc(word,sizeof(char)*(wsize+1));
}
--(*cl);
if((word[ll] == stop) || (feof(f)) || (!(*cl))) {
if(word[ll] != stop) ll++;
word[ll] = '\0';
return word;
}
++ll;
}
}

char x2c(char *what) {
register char digit;

digit = (what[0] >= 'A' ? ((what[0] & 0xdf) - 'A')+10 : (what[0] - '0'));
digit *= 16;
digit += (what[1] >= 'A' ? ((what[1] & 0xdf) - 'A')+10 : (what[1] - '0'));
return(digit);
}

void unescape_url(char *url) {
register int x,y;

for(x=0,y=0;url[y];++x,++y) {
if((url[x] = url[y]) == '%') {
url[x] = x2c(&url[y+1]);
y+=2;
}
}
url[x] = '\0';
}

void plustospace(char *str) {
register int x;

for(x=0;str[x];x++) if(str[x] == '+') str[x] = ' ';
}