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