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esp-link
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Yaaaaaay, POST now works 100% :)

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v0.9.0
Jeroen Domburg 10 years ago
parent 649dc26851
commit a01c02245f
8 changed files with 159 additions and 38 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 13
      html/led.html
  2. 2
      html/test2.html
  3. 10
      html/test3.html
  4. 50
      user/cgi.c
  5. 9
      user/cgi.h
  6. 106
      user/httpd.c
  7. 6
      user/httpd.h
  8. 3
      user/user_main.c

13
html/led.html
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@ -0,0 +1,13 @@
<html><head><title>Test</title></head>
<body>
<p>
There's a LED. You can't see it, so it's no use clicking any of the buttons below. The buttons
do, however, turn the LED on and off.
</p>
<form method="post" action="led.cgi">
<input type="submit" name="led" value="1">
<input type="submit" name="led" value="0">
</form>
</body></html>

2
html/test2.html
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@ -2,9 +2,11 @@
<head><title>Test</title></head>
<body>
<h1>Test2!</h1>
<p><b>New!</b>You can also control the <a href="led.html">LED</a>...</p>
<p>Here's an image of a cat (hopefully...)<br />
<img src="cat.jpeg"><br />
<img src="ceilingcat.jpg"><br />
<img src="disapprove.jpg"><br />
<img src="invisiblepogostick.jpg"><br />
</p>
</body></html>

10
html/test3.html
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@ -0,0 +1,10 @@
<html><head><title>Test</title></head>
<body>
<form method="post" action="test.cgi">
<input type="text" name="Test1" value="t1">
<input type="text" name="Test2" value="t2">
<input type="submit" name="DoIt" value="Do It">
</form>
</body></html>

50
user/cgi.c
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@ -0,0 +1,50 @@
/*
Some random cgi routines.
*/
#include <string.h>
#include <osapi.h>
#include "httpd.h"
#include "cgi.h"
#include "io.h"
int ICACHE_FLASH_ATTR cgiLed(HttpdConnData *connData) {
int len;
char buff[1024];
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
len=httpdFindArg(connData->postBuff, "led", buff, sizeof(buff));
ioLed(atoi(buff));
httpdRedirect(connData, "led.html");
return HTTPD_CGI_DONE;
}
int ICACHE_FLASH_ATTR cgiTest(HttpdConnData *connData) {
int len;
char val1[128];
char val2[128];
char buff[1024];
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
httpdStartResponse(connData, 200);
httpdHeader(connData, "Content-Type", "text/plain");
httpdEndHeaders(connData);
httpdFindArg(connData->postBuff, "Test1", val1, sizeof(val1));
httpdFindArg(connData->postBuff, "Test2", val2, sizeof(val2));
len=os_sprintf(buff, "Field 1: %s\nField 2: %s\n", val1, val2);
espconn_sent(connData->conn, (uint8 *)buff, len);
return HTTPD_CGI_DONE;
}

9
user/cgi.h
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@ -0,0 +1,9 @@
#ifndef CGI_H
#define CGI_H
#include "httpd.h"
int cgiLed(HttpdConnData *connData);
int cgiTest(HttpdConnData *connData);
#endif

106
user/httpd.c
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@ -24,9 +24,7 @@ static HttpdBuiltInUrl *builtInUrls;
struct HttpdPriv {
char head[MAX_HEAD_LEN];
int headPos;
int postLen;
int postPos;
char *postBuff;
};
//Connection pool
@ -75,33 +73,62 @@ static HttpdConnData ICACHE_FLASH_ATTR *httpdFindConnData(void *arg) {
static void ICACHE_FLASH_ATTR httpdRetireConn(HttpdConnData *conn) {
if (conn->priv->postBuff!=NULL) os_free(conn->priv->postBuff);
conn->priv->postBuff=NULL;
if (conn->postBuff!=NULL) os_free(conn->postBuff);
conn->postBuff=NULL;
conn->cgi=NULL;
conn->conn=NULL;
}
//Find a specific arg in a string of get- or post-data.
static char *ICACHE_FLASH_ATTR httpdFindArg(char *line, char *arg) {
char *p;
int al;
if (line==NULL) return NULL;
p=line;
al=os_strlen(arg);
os_printf("Finding %s in %s\n", arg, line);
while (p[0]!=0) {
if (os_strncmp(p, arg, al)==0 && p[al]=='=') {
//Gotcha.
return &p[al+1];
static int httpdHexVal(char c) {
if (c>='0' && c<='9') return c-'0';
if (c>='A' && c<='F') return c-'A'+10;
if (c>='a' && c<='f') return c-'a'+10;
}
//Decode a percent-encoded value
int httpdUrlDecode(char *val, int valLen, char *ret, int retLen) {
int s=0, d=0;
int esced=0, escVal=0;
while (s<valLen && d<retLen) {
if (esced==1) {
escVal=httpdHexVal(val[s])<<4;
esced=2;
} else if (esced==2) {
escVal+=httpdHexVal(val[s]);
ret[d++]=escVal;
esced=0;
} else if (val[s]=='%') {
esced=1;
} else if (val[s]=='+') {
ret[d++]=' ';
} else {
//Wrong arg. Advance to start of next arg.
p+=os_strlen(p)+1;
ret[d++]=val[s];
}
s++;
}
if (d<retLen) ret[d]=0;
}
//Find a specific arg in a string of get- or post-data.
int ICACHE_FLASH_ATTR httpdFindArg(char *line, char *arg, char *buff, int buffLen) {
char *p, *e;
int len;
if (line==NULL) return 0;
p=line;
while(p!=NULL && *p!='\n' && *p!='\r' && *p!=0) {
os_printf("findArg: %s\n", p);
if (os_strncmp(p, arg, os_strlen(arg))==0 && p[strlen(arg)]=='=') {
p+=os_strlen(arg)+1; //move p to start of value
e=(char*)os_strstr(p, "&");
if (e==NULL) e=p+os_strlen(p);
os_printf("findArg: val %s len %d\n", p, (e-p));
return httpdUrlDecode(p, (e-p), buff, buffLen);
}
p=(char*)os_strstr(p, "&");
if (p!=NULL) p+=1;
}
os_printf("Finding %s in %s: Not found :/\n", arg, line);
return NULL; //not found
return 0; //not found
}
static const char *httpNotFoundHeader="HTTP/1.0 404 Not Found\r\nServer: esp8266-httpd/0.1\r\nContent-Type: text/plain\r\n\r\nNot Found.\r\n";
@ -125,6 +152,13 @@ void ICACHE_FLASH_ATTR httpdEndHeaders(HttpdConnData *conn) {
espconn_sent(conn->conn, "\r\n", 2);
}
//ToDo: sprintf->snprintf everywhere
void ICACHE_FLASH_ATTR httpdRedirect(HttpdConnData *conn, char *newUrl) {
char buff[1024];
int l;
l=os_sprintf(buff, "HTTP/1.1 302 Found\r\nLocation: %s\r\n\r\nMoved to %s\r\n", newUrl, newUrl);
espconn_sent(conn->conn, buff, l);
}
static void ICACHE_FLASH_ATTR httpdSentCb(void *arg) {
int r;
@ -192,21 +226,16 @@ static void ICACHE_FLASH_ATTR httpdParseHeader(char *h, HttpdConnData *conn) {
*conn->getArgs=0;
conn->getArgs++;
os_printf("GET args = %s\n", conn->getArgs);
l=os_strlen(conn->getArgs);
for (x=0; x<l; x++) if (conn->getArgs[x]=='&') conn->getArgs[x]=0;
//End with double-zero
conn->getArgs[l]=0;
conn->getArgs[l+1]=0;
} else {
conn->getArgs=NULL;
}
} else if (os_strncmp(h, "Content-Length: ", 16)==0) {
i=0;
while (h[i]!=' ') i++;
conn->priv->postLen=atoi(h+i+1);
if (conn->priv->postLen>MAX_POST) conn->priv->postLen=MAX_POST;
os_printf("Mallocced buffer for %d bytes of post data.\n", conn->priv->postLen);
conn->priv->postBuff=(char*)os_malloc(conn->priv->postLen+1);
conn->postLen=atoi(h+i+1);
if (conn->postLen>MAX_POST) conn->postLen=MAX_POST;
os_printf("Mallocced buffer for %d bytes of post data.\n", conn->postLen);
conn->postBuff=(char*)os_malloc(conn->postLen+1);
conn->priv->postPos=0;
}
}
@ -238,19 +267,19 @@ static void ICACHE_FLASH_ATTR httpdRecvCb(void *arg, char *data, unsigned short
p=e+2;
}
//If we don't need to receive post data, we can send the response now.
if (conn->priv->postLen==0) {
if (conn->postLen==0) {
httpdSendResp(conn);
}
conn->priv->headPos=-1; //Indicate we're done with the headers.
}
} else if (conn->priv->postPos!=-1 && conn->priv->postLen!=0 && conn->priv->postPos <= conn->priv->postLen) {
} else if (conn->priv->postPos!=-1 && conn->postLen!=0 && conn->priv->postPos <= conn->postLen) {
//This byte is a POST byte.
conn->priv->postBuff[conn->priv->postPos++]=data[x];
if (conn->priv->postPos>=conn->priv->postLen) {
conn->postBuff[conn->priv->postPos++]=data[x];
if (conn->priv->postPos>=conn->postLen) {
//Received post stuff.
conn->priv->postBuff[conn->priv->postPos]=0; //zero-terminate
conn->postBuff[conn->priv->postPos]=0; //zero-terminate
conn->priv->postPos=-1;
os_printf("Post data: %s\n", conn->priv->postBuff);
os_printf("Post data: %s\n", conn->postBuff);
//Send the response.
httpdSendResp(conn);
return;
@ -269,6 +298,7 @@ static void ICACHE_FLASH_ATTR httpdReconCb(void *arg, sint8 err) {
static void ICACHE_FLASH_ATTR httpdDisconCb(void *arg) {
#if 0
//Stupid esp sdk passes through wrong arg here, namely the one of the *listening* socket.
//If it ever gets fixed, be sure to update the code in this snippet; it's probably out-of-date.
HttpdConnData *conn=httpdFindConnData(arg);
os_printf("Disconnected, conn=%p\n", conn);
if (conn==NULL) return;
@ -304,9 +334,9 @@ static void ICACHE_FLASH_ATTR httpdConnectCb(void *arg) {
}
connData[i].conn=conn;
connData[i].priv->headPos=0;
connData[i].priv->postBuff=NULL;
connData[i].postBuff=NULL;
connData[i].priv->postPos=0;
connData[i].priv->postLen=0;
connData[i].postLen=0;
espconn_regist_recvcb(conn, httpdRecvCb);
espconn_regist_reconcb(conn, httpdReconCb);

6
user/httpd.h
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@ -22,6 +22,8 @@ struct HttpdConnData {
void *cgiData;
HttpdPriv *priv;
cgiSendCallback cgi;
int postLen;
char *postBuff;
};
@ -34,7 +36,9 @@ typedef struct {
const void *cgiArg;
} HttpdBuiltInUrl;
void ICACHE_FLASH_ATTR httpdRedirect(HttpdConnData *conn, char *newUrl);
int httpdUrlDecode(char *val, int valLen, char *ret, int retLen);
int ICACHE_FLASH_ATTR httpdFindArg(char *line, char *arg, char *buff, int buffLen);
void ICACHE_FLASH_ATTR httpdInit(HttpdBuiltInUrl *fixedUrls, int port);
const char *httpdGetMimetype(char *url);
void ICACHE_FLASH_ATTR httpdStartResponse(HttpdConnData *conn, int code);

3
user/user_main.c
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@ -4,9 +4,12 @@
#include "httpd.h"
#include "io.h"
#include "httpdespfs.h"
#include "cgi.h"
HttpdBuiltInUrl builtInUrls[]={
// {"/", cgiLiteral, "Lalala etc"},
{"/led.cgi", cgiLed, NULL},
{"/test.cgi", cgiTest, NULL},
{"*", cgiEspFsHook, NULL},
{NULL, NULL, NULL}
};

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