int urldecode（char * src，char * last，char * dest） [英] int urldecode(char *src, char *last, char *dest)
问题描述
这基于我在 http：//www.cs .tut.fi / ~jkorpela /
表格/ cgic.html
#include< fcgi_stdio.h>
#include< stdlib.h>
int urldecode（char * src，char * last，char * dest）{
int code;
for（; src！= last; src ++，dest ++）{
if（* src ==''+''）* dest ='''';
else if（* src ==''％''）{
if（sscanf（src + 1，"％2x"，& code）！= 1 ）code =''？'';
* dest =代码;
src + = 2;
}
else * dest = * src;
}
* dest =''\ n'';
* ++ dest = ''\''';
返回0;
}
int post（char * output）{
char * lenstr = getenv（" CONTENT_LENGTH"）;
char * input;
long len;
if （lenstr！= NULL&& sscanf（le nstr，"％ld"& len）== 1）{
fgets（输入，len + 1，stdin）;
urldecode（输入，输入+ len，输出）;
}
返回0;
}
int main（void ）{
char *输出;
而（FCGI_Accept（）> = 0）{
post（输出）;
printf（" Content-Type：text / xml; charset = utf-8"
" \\\\ nn"
" \\\\ nn"
" ％s"
" \ n"
，输出）;
}
返回0; < br $>
}
我做的唯一一件事是将它简化了一下，所以我能理解它更好一点。目标是从xmlhttprequest读取帖子，然后
返回其内容。
到目前为止我收到帖子但是urldecoding似乎没有播放
并输出任何建议？
This based on a example i found at http://www.cs.tut.fi/~jkorpela/
forms/cgic.html
#include <fcgi_stdio.h>
#include <stdlib.h>
int urldecode(char *src, char *last, char *dest){
int code;
for (; src != last; src++, dest++){
if (*src == ''+'') *dest = '' '';
else if(*src == ''%'') {
if(sscanf(src+1, "%2x", &code) != 1) code = ''?'';
*dest = code;
src +=2;
}
else *dest = *src;
}
*dest = ''\n'';
*++dest = ''\0'';
return 0;
}
int post(char *output){
char *lenstr=getenv("CONTENT_LENGTH");
char *input;
long len;
if (lenstr != NULL && sscanf(lenstr, "%ld", &len) == 1) {
fgets(input, len+1, stdin);
urldecode(input, input+len, output);
}
return 0;
}
int main (void){
char *output;
while (FCGI_Accept() >= 0) {
post(output);
printf("Content-Type: text/xml; charset=utf-8"
"\r\n"
"\r\n"
"%s"
"\n"
,output);
}
return 0;
}
The only thing i did is simplified it a bit so i could understand it a
bit better. The goal is to read the post from a xmlhttprequest and
return its contents back.
So far i receive the post but the urldecoding seems not to play along
and scrambles the output, any suggestions ?
推荐答案
2月13日上午12:31， "格特" < gert.cuyk ... @ gmail.comwrote：
On Feb 13, 12:31 am, "gert" <gert.cuyk...@gmail.comwrote:
这是基于我发现的一个例子：http：//www.cs.tut.fi/~jkorpela /
表格/ cgic.html
#include< fcgi_stdio.h>
#include< stdlib.h>
int urldecode（char * src，char * last，char * dest）{
int code;
for（; src！= last; src ++，dest ++）{
if（* src ==''+''）* dest ='''';
else if（* src ==''％''）{
if（sscanf（src + 1，"％2x"，& code）！= 1）code =''？'';
* dest =代码;
src + = 2;
}
else * dest = * src;
}
* dest =''\ n'';
* ++ dest =''\''';
返回0;
}
int post（char * output）{
char * lenstr = getenv（" CONTENT_LENGTH"）;
char *输入;
长len;
if（lenstr！= NULL&& sscanf（lenstr，"％ld"& len）== 1）{
fgets（输入，len + 1，stdin）;
urldecode（输入，输入+ len，输出）;
}
返回0;
}
int main（无效）{
char *输出;
而（ FCGI_Accept（）> = 0）{
post（输出）;
printf（" Content-Type：text / xml; charset = utf-8"
" \\\\ nn"
" \\\\ nn"
" ％s"
" \ n"
，输出）;
}
返回0; < br $>
}
我做过的唯一一件事就是简化了一下，所以我能理解它好一点
更好一点。目标是从xmlhttprequest读取帖子，然后
返回其内容。
到目前为止我收到帖子但是urldecoding似乎没有播放
并输出输出，有什么建议吗？
This based on a example i found athttp://www.cs.tut.fi/~jkorpela/
forms/cgic.html
#include <fcgi_stdio.h>
#include <stdlib.h>
int urldecode(char *src, char *last, char *dest){
int code;
for (; src != last; src++, dest++){
if (*src == ''+'') *dest = '' '';
else if(*src == ''%'') {
if(sscanf(src+1, "%2x", &code) != 1) code = ''?'';
*dest = code;
src +=2;
}
else *dest = *src;
}
*dest = ''\n'';
*++dest = ''\0'';
return 0;
}
int post(char *output){
char *lenstr=getenv("CONTENT_LENGTH");
char *input;
long len;
if (lenstr != NULL && sscanf(lenstr, "%ld", &len) == 1) {
fgets(input, len+1, stdin);
urldecode(input, input+len, output);
}
return 0;
}
int main (void){
char *output;
while (FCGI_Accept() >= 0) {
post(output);
printf("Content-Type: text/xml; charset=utf-8"
"\r\n"
"\r\n"
"%s"
"\n"
,output);
}
return 0;
}
The only thing i did is simplified it a bit so i could understand it a
bit better. The goal is to read the post from a xmlhttprequest and
return its contents back.
So far i receive the post but the urldecoding seems not to play along
and scrambles the output, any suggestions ?
我觉得这样做更好:)
if（lenstr！= NULL）{
sscanf（lenstr，"％ld"& len）
fgets（输入，len + 1，stdin）;
urldecode（输入，输入+ len，输出）;
}
还有什么可靠的？
better do it like this i think :)
if (lenstr != NULL ) {
sscanf(lenstr, "%ld", &len)
fgets(input, len+1, stdin);
urldecode(input, input+len, output);
}
still scrambely doh ?
gert写道：
gert wrote:
这是基于我在 http://www.cs.tut.fi/~jkorpela/
表格/ cgic.html
This based on a example i found at http://www.cs.tut.fi/~jkorpela/
forms/cgic.html
< snip code>
<snip code>
>
我做过的唯一一件事就是简化它，所以我能理解它
好一点。目标是从xmlhttprequest读取帖子，然后
返回其内容。
到目前为止我收到帖子但是urldecoding似乎没有播放
并输出输出，任何建议？
>
The only thing i did is simplified it a bit so i could understand it a
bit better. The goal is to read the post from a xmlhttprequest and
return its contents back.
So far i receive the post but the urldecoding seems not to play along
and scrambles the output, any suggestions ?
编写一些测试以了解代码的工作原理。
-
Ian Collins。
Write some tests in order to understand how the code works.
--
Ian Collins.
gert写道：
gert wrote:
这基于我在 http：//www.cs .tut.fi / ~jkorpela /
表格/ cgic.html
#include< fcgi_stdio.h>
#include< stdlib.h>
int urldecode（char * src，char * last，char * dest）{
int code;
for（; src！= last; src ++，dest ++）{
if（* src ==''+''）* dest ='''';
else if（* src ==''％''）{
if（sscanf（ src + 1，"％2x"& code）！= 1）code =''？'';
* dest = code;
src + = 2;
}
其他* dest = * src;
}
* dest =''\ n'';
* ++ dest =''\''';
返回0;
}
This based on a example i found at http://www.cs.tut.fi/~jkorpela/
forms/cgic.html
#include <fcgi_stdio.h>
#include <stdlib.h>
int urldecode(char *src, char *last, char *dest){
int code;
for (; src != last; src++, dest++){
if (*src == ''+'') *dest = '' '';
else if(*src == ''%'') {
if(sscanf(src+1, "%2x", &code) != 1) code = ''?'';
*dest = code;
src +=2;
}
else *dest = *src;
}
*dest = ''\n'';
*++dest = ''\0'';
return 0;
}
我写了一些类似于玩具cgi表格的东西，我做了一段时间后回来......
它不是很好的检查错误，但是我确实记得它至少工作。
#include< string.h>
#include< stdio.h>
#include< stdlib.h>
struct cgi_var__ {
char * key;
char * val;
size_t key_l;
size_t val_l;
};
static int form_decode（cgi_var * cv， size_t off）
{
char c，tmp [4];
int r;
if（cv-> val [off]！=''％''）{
fprintf（stdout，" form_decode ：坏值\ n"）;
返回-1;
}
if（（r =（cv-） > val + cv-> val_l） - （cv-> val + off））< 3）{
fprintf（stdout，form_decode：length too short\ n）;
返回-1;
}
memcpy（tmp，cv-> val + off，MIN（3，r））; tmp [3] =''\''';
c =（unsigned char）strtol（tmp + 1，NULL，16）;
/ *
*数据==文字％7Cj％25％5C％25
* 01234567890123456
*
* c == |，off == 4，r == 13
* c ==％，off == 6，r == 9
* c == \\ \\，off == 7，r == 6
* c ==％，off == 8，r == 3
* /
memcpy（cv-> val + off，& c，sizeof c）;
memmove（cv-> val + off + 1，cv-> val + off + 3，r - 3）;
cv-> val_l - = 2;
r =（cv-> val + cv-> val_l） - （cv-> val + off）;
返回0;
}
静态int cv_filter（cgi_var * cv）
{
size_t i;
/ *过滤掉rug-rats或解码％xx * /
for（i = 0; i< cv-> val_l; i ++）{
if（cv-> val [i] =='' ％''）
form_decode（cv，i）;
switch（cv-> val [i]）{
case'' +''：案例'' \\：壳体'：壳体"：
CV-> VAL [I] =‘’;休息;
默认：休息;
}
}
返回0;
}
I had written something similar for a toy cgi form util I did a while back...
It''s not super well checked for errors, but I do remember it atleast working.
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
struct cgi_var__ {
char *key;
char *val;
size_t key_l;
size_t val_l;
};
static int form_decode(cgi_var *cv, size_t off)
{
char c, tmp[4];
int r;
if (cv->val[off] != ''%'') {
fprintf(stdout, "form_decode: bad value\n");
return -1;
}
if ((r = (cv->val + cv->val_l) - (cv->val + off)) < 3) {
fprintf(stdout, "form_decode: length too short\n");
return -1;
}
memcpy(tmp, cv->val + off, MIN(3, r)); tmp[3] = ''\0'';
c = (unsigned char)strtol(tmp + 1, NULL, 16);
/*
* data == text%7Cj%25%5C%25
* 01234567890123456
*
* c == |, off == 4, r == 13
* c == %, off == 6, r == 9
* c == \, off == 7, r == 6
* c == %, off == 8, r == 3
*/
memcpy(cv->val + off, &c, sizeof c);
memmove(cv->val + off + 1, cv->val + off + 3, r - 3);
cv->val_l -= 2;
r = (cv->val + cv->val_l) - (cv->val + off);
return 0;
}
static int cv_filter(cgi_var *cv)
{
size_t i;
/* filter out rug-rats or decode %xx */
for (i = 0; i < cv->val_l; i++) {
if (cv->val[i] == ''%'')
form_decode(cv, i);
switch (cv->val[i]) {
case ''+'': case ''\'''': case ''`'': case ''"'':
cv->val[i] = '' ''; break;
default: break;
}
}
return 0;
}
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