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202 lines
4.8 KiB
202 lines
4.8 KiB
10 years ago
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#include "driver/uart.h"
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#include "c_types.h"
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#include "user_interface.h"
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#include "espconn.h"
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#include "mem.h"
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#include "osapi.h"
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#include "espconn.h"
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#include "httpd.h"
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#include "io.h"
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#define MAX_HEAD_LEN 1024
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int cgiSet(struct espconn *conn);
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typedef int (* cgiSendCallback)(struct espconn *conn);
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typedef struct {
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const char *url;
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const char *fixedResp;
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cgiSendCallback cgiCb;
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} UrlData;
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const char htmlIndex[]="<html><head><title>Hello World</title></head> \
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<body><h1>Hello, World!</h1></body> \
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</html>";
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static const UrlData urls[]={
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{"/", htmlIndex, NULL},
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{"/set", NULL, cgiSet},
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{NULL, NULL, NULL},
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};
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static struct espconn conn;
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static esp_tcp tcp;
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static int recLen;
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static char recBuff[MAX_HEAD_LEN];
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typedef struct {
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char *url;
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char *getArgs;
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const UrlData *effUrl;
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} GetData;
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static GetData getData;
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//Find a specific arg in a string of get- or post-data.
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static char *ICACHE_FLASH_ATTR httpdFindArg(char *line, char *arg) {
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char *p;
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int al;
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if (line==NULL) return NULL;
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p=line;
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al=os_strlen(arg);
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os_printf("Finding %s in %s\n", arg, line);
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while (p[0]!=0) {
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if (os_strncmp(p, arg, al)==0 && p[al]=='=') {
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//Gotcha.
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return &p[al+1];
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} else {
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//Wrong arg. Advance to start of next arg.
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p+=os_strlen(p)+1;
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}
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}
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os_printf("Finding %s in %s: Not found :/\n", arg, line);
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return NULL; //not found
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}
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//ToDo: Move cgi functions to somewhere else
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int cgiSet(struct espconn *conn) {
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char *on;
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static const char okStr[]="<html><head><title>OK</title></head><body><p>OK</p></body></html>";
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on=httpdFindArg(getData.getArgs, "led");
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os_printf("cgiSet: on=%s\n", on?on:"not found");
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if (on!=NULL) ioLed(atoi(on));
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espconn_sent(conn, (uint8 *)okStr, os_strlen(okStr));
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return 1;
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}
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static const char *httpOkHeader="HTTP/1.0 200 OK\r\nServer: esp8266-thingie/0.1\r\nContent-Type: text/html\r\n\r\n";
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static const char *httpNotFoundHeader="HTTP/1.0 404 Not Found\r\nServer: esp8266-thingie/0.1\r\n\r\nNot Found.\r\n";
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static void ICACHE_FLASH_ATTR httpdSentCb(void *arg) {
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struct espconn *conn=arg;
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if (getData.effUrl==NULL) {
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espconn_disconnect(conn);
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return;
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}
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if (getData.effUrl->cgiCb!=NULL) {
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if (getData.effUrl->cgiCb(conn)) getData.effUrl=NULL;
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} else {
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espconn_sent(conn, (uint8 *)getData.effUrl->fixedResp, os_strlen(getData.effUrl->fixedResp));
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getData.effUrl=NULL;
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}
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}
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static void ICACHE_FLASH_ATTR httpdSendResp(struct espconn *conn) {
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int i=0;
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while (urls[i].url!=NULL) {
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if (os_strcmp(urls[i].url, getData.url)==0) {
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getData.effUrl=&urls[i];
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os_printf("Is url index %d\n", i);
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espconn_sent(conn, (uint8 *)httpOkHeader, os_strlen(httpOkHeader));
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return;
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}
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i++;
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}
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//Can't find :/
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espconn_sent(conn, (uint8 *)httpNotFoundHeader, os_strlen(httpNotFoundHeader));
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}
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static void ICACHE_FLASH_ATTR httpdParseHeader(char *h) {
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os_printf("Got header %s\n", h);
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if (os_strncmp(h, "GET ", 4)==0) {
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char *e;
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getData.url=h+4;
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e=(char*)os_strstr(getData.url, " ");
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if (e==NULL) return; //wtf?
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*e=0; //terminate url part
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os_printf("URL = %s\n", getData.url);
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getData.getArgs=(char*)os_strstr(getData.url, "?");
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if (getData.getArgs!=0) {
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int x,l;
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*getData.getArgs=0;
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getData.getArgs++;
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os_printf("GET args = %s\n", getData.getArgs);
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l=os_strlen(getData.getArgs);
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for (x=0; x<l; x++) if (getData.getArgs[x]=='&') getData.getArgs[x]=0;
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//End with double-zero
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getData.getArgs[l]=0;
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getData.getArgs[l+1]=0;
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} else {
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getData.getArgs=NULL;
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}
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}
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}
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static void ICACHE_FLASH_ATTR httpdRecvCb(void *arg, char *data, unsigned short len) {
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struct espconn *conn=arg;
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int x;
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char *p, *e;
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if (recLen==-1) return; //we don't accept data anymore
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for (x=0; x<len && recLen!=MAX_HEAD_LEN; x++) recBuff[recLen++]=data[x];
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recBuff[recLen]=0;
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//Scan for /r/n/r/n
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if ((char *)os_strstr(recBuff, "\r\n\r\n")!=NULL) {
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//Reset url data
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getData.url=NULL;
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//Find end of next header line
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p=recBuff;
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while(p<(&recBuff[recLen-4])) {
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e=(char *)os_strstr(p, "\r\n");
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if (e==NULL) break;
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e[0]=0;
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httpdParseHeader(p);
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p=e+2;
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}
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httpdSendResp(conn);
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}
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}
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static void ICACHE_FLASH_ATTR httpdReconCb(void *arg, sint8 err) {
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os_printf("ReconCb\n");
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httpdInit();
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}
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static void ICACHE_FLASH_ATTR httpdDisconCb(void *arg) {
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struct espconn *conn=arg;
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os_printf("Disconnected, conn=%p\n", conn);
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}
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static void ICACHE_FLASH_ATTR httpdConnectCb(void *arg) {
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struct espconn *conn=arg;
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os_printf("Con req, conn=%p\n", conn);
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recLen=0;
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espconn_regist_recvcb(conn, httpdRecvCb);
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espconn_regist_reconcb(conn, httpdReconCb);
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espconn_regist_disconcb(conn, httpdDisconCb);
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espconn_regist_sentcb(conn, httpdSentCb);
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}
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void ICACHE_FLASH_ATTR httpdInit() {
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conn.type=ESPCONN_TCP;
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conn.state=ESPCONN_NONE;
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tcp.local_port=80;
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conn.proto.tcp=&tcp;
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os_printf("Httpd init, conn=%p\n", conn);
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espconn_regist_connectcb(&conn, httpdConnectCb);
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espconn_accept(&conn);
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}
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