ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/user/cgi.c

242 lines
6.8 KiB

/*
Some random cgi routines. Used in the LED example and the page that returns the entire
flash as a binary. Also handles the hit counter on the main page.
*/
/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
* this notice you can do whatever you want with this stuff. If we meet some day,
* and you think this stuff is worth it, you can buy me a beer in return.
* ----------------------------------------------------------------------------
*/
#include <string.h>
#include <osapi.h>
#include "user_interface.h"
#include "mem.h"
#include "httpd.h"
#include "cgi.h"
#include "io.h"
#include <ip_addr.h>
#include "espmissingincludes.h"
//cause I can't be bothered to write an ioGetLed()
static char currLedState=0;
//Cgi that turns the LED on or off according to the 'led' param in the POST data
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));
if (len!=0) {
currLedState=atoi(buff);
ioLed(currLedState);
}
httpdRedirect(connData, "led.tpl");
return HTTPD_CGI_DONE;
}
//Template code for the led page.
int ICACHE_FLASH_ATTR tplLed(HttpdConnData *connData, char *token, void **arg) {
char buff[128];
if (token==NULL) return HTTPD_CGI_DONE;
os_strcpy(buff, "Unknown");
if (os_strcmp(token, "ledstate")==0) {
if (currLedState) {
os_strcpy(buff, "on");
} else {
os_strcpy(buff, "off");
}
}
httpdSend(connData, buff, -1);
return HTTPD_CGI_DONE;
}
static long hitCounter=0;
//Template code for the counter on the index page.
int ICACHE_FLASH_ATTR tplCounter(HttpdConnData *connData, char *token, void **arg) {
char buff[128];
if (token==NULL) return HTTPD_CGI_DONE;
if (os_strcmp(token, "counter")==0) {
hitCounter++;
os_sprintf(buff, "%ld", hitCounter);
}
httpdSend(connData, buff, -1);
return HTTPD_CGI_DONE;
}
//Cgi that reads the SPI flash. Assumes 512KByte flash.
int ICACHE_FLASH_ATTR cgiReadFlash(HttpdConnData *connData) {
int *pos=(int *)&connData->cgiData;
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
if (*pos==0) {
os_printf("Start flash download.\n");
httpdStartResponse(connData, 200);
httpdHeader(connData, "Content-Type", "application/bin");
httpdEndHeaders(connData);
*pos=0x40200000;
return HTTPD_CGI_MORE;
}
//Send 1K of flash per call. We will get called again if we haven't sent 512K yet.
espconn_sent(connData->conn, (uint8 *)(*pos), 1024);
*pos+=1024;
if (*pos>=0x40200000+(512*1024)) return HTTPD_CGI_DONE; else return HTTPD_CGI_MORE;
}
#define LOOKING_FOR_SECTION 1
#define CHECKING_HEADERS 2
#define IN_DATA 3
typedef struct updateState_t {
char delimiter[61];
int step;
} updateState_t;
char* bin_strstr(char *haystack, char *needle, int haystackLen, int needleLen){
if(needleLen < 0){
needleLen = strlen(needle);
}
char * end = haystack + haystackLen;
for(; haystack < end; haystack++){
if(*haystack == *needle){
int match = true;
for(int i = 1; i< needleLen; i++){
if(*(needle + i) != *(haystack + i)){
match = false;
break;
}
}
if(match){
return haystack;
}
}
}
return NULL;
}
//Cgi to allow user to upload a new espfs image
int ICACHE_FLASH_ATTR updateWeb(HttpdConnData *connData) {
os_printf("data size : %d\r\n", connData->postBuffLen);
updateState_t *state;
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
if(connData->requestType == GET){
httpdStartResponse(connData, 200);
httpdHeader(connData, "Content-Length", "135");
httpdEndHeaders(connData);
httpdSend(connData, "<html><body><form method=\"POST\" enctype=\"multipart/form-data\"><input type=\"file\" name=\"file\"><input type=\"submit\"></form></body></html>", 135);
}else if(connData->requestType == POST){
if(connData->postReceived == connData->postBuffLen){
//it's the first time this handler has been called for this request
connData->cgiPrivData = (int*)os_malloc(sizeof(updateState_t));
state = connData->cgiPrivData;
state->step = LOOKING_FOR_SECTION;
}else{
state = connData->cgiPrivData;
}
char *b;
char *p;
char * end = connData->postBuff + connData->postBuffLen;
for(b = connData->postBuff; b < end; b++){
if(state->step == LOOKING_FOR_SECTION){
if((p = bin_strstr(b, connData->multipartBoundary, connData->postBuffLen - (b - connData->postBuff), -1)) != NULL){
os_printf("Found section\r\n");
// We've found one of the sections, now make sure it's the file
b = p + strlen(connData->multipartBoundary) + 2;
state->step = CHECKING_HEADERS;
}else{
os_printf("Not Found section\r\n");
break;
}
}
if(state->step == CHECKING_HEADERS){
//os_printf("next data: %s\n", b);
if(!os_strncmp(b, "Content-Disposition: form-data", 30)){
os_printf("Correct header\r\n");
// It's the Content-Disposition header
// Find the end of the line
p = os_strstr(b, "\r\n");
// turn the end of the line into a string end so we can search within the line
*p = 0;
if(os_strstr(b, "name=\"file\"") != NULL){
os_printf("Correct file\r\n");
b = p + 2;
// it's the correct section, skip to the data
if((p = os_strstr(b, "\r\n\r\n")) != NULL){
os_printf("Skipping to data\r\n");
b = p + 4;
state->step = IN_DATA;
}else{
os_printf("Couldn't find line endings\r\n");
os_printf("data: %s\n", b);
return HTTPD_CGI_DONE;
}
}else{
// it's the wrong section, skip to the next boundary
b = p + 1;
state->step = LOOKING_FOR_SECTION;
}
}else{
// Skip to the next header
p = os_strstr(b, "\r\n");
b = p + 2;
}
}
if(state->step == IN_DATA){
//os_printf("In data\r\n");
// Make sure it doesn't contain the boundary, but we can't rely on there being no zeroes so can't use strstr
if((p = bin_strstr(b, connData->multipartBoundary, connData->postBuffLen - (b - connData->postBuff), -1)) == NULL){
// all of the data is file data
}else{
if(b < (p - 2)){ // -2 bytes for the \r\n
// This is a byte that's part of the file
os_printf("%c", *b);
}else{
os_printf("\r\nComplete\r\n");
}
}
}
}
/*
os_printf("postReceived: %d\r\n", connData->postReceived);
os_printf("postLen : %d\r\n", connData->postLen);
os_printf("data size : %d\r\n", connData->postBuffLen);
*/
if(connData->postReceived >= connData->postLen){
httpdStartResponse(connData, 204);
if (connData->cgiPrivData!=NULL) os_free(connData->cgiPrivData);
return HTTPD_CGI_DONE;
}else{
return HTTPD_CGI_MORE;
}
}
return HTTPD_CGI_DONE;
}