Use iterators in espfs

Makefile

@@ -101,7 +101,7 @@ LED_SERIAL_PIN      ?= 14
 # --------------- esp-link modules config options ---------------
 
 # Optional Modules mqtt
-MODULES ?= mqtt rest syslog
+MODULES ?= mqtt rest syslog web-server
 
 # --------------- esphttpd config options ---------------
 
@@ -220,6 +220,10 @@ ifneq (,$(findstring syslog,$(MODULES)))
 	CFLAGS		+= -DSYSLOG
 endif
 
+ifneq (,$(findstring web-server,$(MODULES)))
+	CFLAGS		+= -DWEBSERVER
+endif
+
 # which modules (subdirectories) of the project to include in compiling
 LIBRARIES_DIR 	= libraries
 MODULES		  	+= espfs httpd user serial cmd esp-link

esp-link/main.c

@@ -31,6 +31,7 @@
 #include "log.h"
 #include "gpio.h"
 #include "cgiservices.h"
+#include "web-server.h"
 
 #ifdef SYSLOG
 #include "syslog.h"
@@ -157,7 +158,7 @@ void user_init(void) {
   //os_printf("espFsInit %s\n", res?"ERR":"ok");
   // mount the http handlers
   httpdInit(builtInUrls, 80);
-  httpdespfsInit();
+  webServerInit();
   
   // init the wifi-serial transparent bridge (port 23)
   serbridgeInit(23, 2323);

espfs/espfs.c

@@ -155,54 +155,78 @@ int ICACHE_FLASH_ATTR espFsFlags(EspFsFile *fh) {
 	return (int)flags;
 }
 
+void ICACHE_FLASH_ATTR espFsIteratorInit(EspFsContext *ctx, EspFsIterator *iterator)
+{
+	if( ctx->data == NULL )
+	{
+		iterator->ctx = NULL;
+		return;
+	}
+	iterator->ctx = ctx;
+	iterator->p = ctx->data;
+}
+
+int ICACHE_FLASH_ATTR espFsIteratorNext(EspFsIterator *iterator)
+{
+	if( iterator->ctx == NULL )
+		return 0;
+	
+	char * p = iterator->p;
+	
+	iterator->node = p;
+	EspFsHeader * hdr = &iterator->header;
+	espfs_memcpy(iterator->ctx, hdr, p, sizeof(EspFsHeader));
+	
+	if (hdr->magic!=ESPFS_MAGIC) {
+#ifdef ESPFS_DBG
+		os_printf("Magic mismatch. EspFS image broken.\n");
+#endif
+		return 0;
+	}
+	if (hdr->flags&FLAG_LASTFILE) {
+		//os_printf("End of image.\n");
+		return 0;
+	}
+	
+	p += sizeof(EspFsHeader);
+	
+	//Grab the name of the file.
+	espfs_memcpy(iterator->ctx, iterator->name, p, sizeof(iterator->name));
+	
+	p+=hdr->nameLen+hdr->fileLenComp;
+	if ((int)p&3) p+=4-((int)p&3); //align to next 32bit val
+	iterator->p = p;
+	return 1;
+}
+
 //Open a file and return a pointer to the file desc struct.
 EspFsFile ICACHE_FLASH_ATTR *espFsOpen(EspFsContext *ctx, char *fileName) {
-	if (ctx->data == NULL) {
+	EspFsIterator it;
+	espFsIteratorInit(ctx, &it);
+	if (it.ctx == NULL) {
 #ifdef ESPFS_DBG
 		os_printf("Call espFsInit first!\n");
 #endif
 		return NULL;
 	}
-	char *p=ctx->data;
-	char *hpos;
-	char namebuf[256];
-	EspFsHeader h;
-	EspFsFile *r;
 	//Strip initial slashes
 	while(fileName[0]=='/') fileName++;
-	//Go find that file!
-	while(1) {
-		hpos=p;
-		//Grab the next file header.
-		espfs_memcpy(ctx, &h, p, sizeof(EspFsHeader));
-		if (h.magic!=ESPFS_MAGIC) {
-#ifdef ESPFS_DBG
-			os_printf("Magic mismatch. EspFS image broken.\n");
-#endif
-			return NULL;
-		}
-		if (h.flags&FLAG_LASTFILE) {
-			//os_printf("End of image.\n");
-			return NULL;
-		}
-		//Grab the name of the file.
-		p+=sizeof(EspFsHeader);
-		espfs_memcpy(ctx, namebuf, p, sizeof(namebuf));
-//		os_printf("Found file '%s'. Namelen=%x fileLenComp=%x, compr=%d flags=%d\n",
-//				namebuf, (unsigned int)h.nameLen, (unsigned int)h.fileLenComp, h.compression, h.flags);
-		if (os_strcmp(namebuf, fileName)==0) {
+	
+	//Search the file
+	while( espFsIteratorNext(&it) ) 
+	{
+		if (os_strcmp(it.name, fileName)==0) {
 			//Yay, this is the file we need!
-			p+=h.nameLen; //Skip to content.
-			r=(EspFsFile *)os_malloc(sizeof(EspFsFile)); //Alloc file desc mem
+			EspFsFile * r=(EspFsFile *)os_malloc(sizeof(EspFsFile)); //Alloc file desc mem
 			//os_printf("Alloc %p[%d]\n", r, sizeof(EspFsFile));
 			if (r==NULL) return NULL;
 			r->ctx = ctx;
-			r->header=(EspFsHeader *)hpos;
-			r->decompressor=h.compression;
-			r->posComp=p;
-			r->posStart=p;
+			r->header=(EspFsHeader *)it.node;
+			r->decompressor=it.header.compression;
+			r->posComp=it.node + it.header.nameLen  + sizeof(EspFsHeader);
+			r->posStart=it.node + it.header.nameLen  + sizeof(EspFsHeader);
 			r->posDecomp=0;
-			if (h.compression==COMPRESS_NONE) {
+			if (it.header.compression==COMPRESS_NONE) {
 				r->decompData=NULL;
 			} else {
 #ifdef ESPFS_DBG
@@ -212,10 +236,8 @@ EspFsFile ICACHE_FLASH_ATTR *espFsOpen(EspFsContext *ctx, char *fileName) {
 			}
 			return r;
 		}
-		//We don't need this file. Skip name and file
-		p+=h.nameLen+h.fileLenComp;
-		if ((int)p&3) p+=4-((int)p&3); //align to next 32bit val
 	}
+	return NULL;
 }
 
 //Read len bytes from the given file into buff. Returns the actual amount of bytes read.

espfs/espfs.h

@@ -1,6 +1,8 @@
 #ifndef ESPFS_H
 #define ESPFS_H
 
+#include "espfsformat.h"
+
 typedef enum {
 	ESPFS_INIT_RESULT_OK,
 	ESPFS_INIT_RESULT_NO_IMAGE,
@@ -15,6 +17,14 @@ typedef enum {
 typedef struct EspFsFile EspFsFile;
 typedef struct EspFsContext EspFsContext;
 
+typedef struct {
+	EspFsHeader   header;
+	EspFsContext *ctx;
+	char          name[256];
+	char         *node;
+	char *        p;
+} EspFsIterator;
+
 extern EspFsContext * espLinkCtx;
 extern EspFsContext * userPageCtx;
 
@@ -25,5 +35,7 @@ int espFsFlags(EspFsFile *fh);
 int espFsRead(EspFsFile *fh, char *buff, int len);
 void espFsClose(EspFsFile *fh);
 
+void espFsIteratorInit(EspFsContext *ctx, EspFsIterator *iterator);
+int espFsIteratorNext(EspFsIterator *iterator);
 
 #endif

httpd/httpdespfs.c

@@ -13,21 +13,11 @@ Connector to let httpd use the espfs filesystem to serve the files in it.
  * ----------------------------------------------------------------------------
  */
 #include "httpdespfs.h"
-#include "config.h"
 
 // The static files marked with FLAG_GZIP are compressed and will be served with GZIP compression.
 // If the client does not advertise that he accepts GZIP send following warning message (telnet users for e.g.)
 static const char *gzipNonSupportedMessage = "HTTP/1.0 501 Not implemented\r\nServer: esp8266-httpd/"HTTPDVER"\r\nConnection: close\r\nContent-Type: text/plain\r\nContent-Length: 52\r\n\r\nYour browser does not accept gzip-compressed data.\r\n";
 
-void ICACHE_FLASH_ATTR httpdespfsInit()
-{
-	espFsInit(userPageCtx, (void *)getUserPageSectionStart(), ESPFS_FLASH);
-	if( espFsIsValid( userPageCtx ) )
-		os_printf("Valid user file system found!\n");
-	else
-		os_printf("No user file system found!\n");
-}
-
 //This is a catch-all cgi function. It takes the url passed to it, looks up the corresponding
 //path in the filesystem and if it exists, passes the file through. This simulates what a normal
 //webserver would do with static files.

httpd/httpdespfs.h

@@ -7,8 +7,6 @@
 #include "cgi.h"
 #include "httpd.h"
 
-void httpdespfsInit();
-
 int cgiEspFsHook(HttpdConnData *connData);
 //int cgiEspFsTemplate(HttpdConnData *connData);
 //int ICACHE_FLASH_ATTR cgiEspFsHtml(HttpdConnData *connData);

web-server/web-server.c

@@ -0,0 +1,34 @@
+#include "web-server.h"
+
+#include "espfs.h"
+#include "config.h"
+
+void ICACHE_FLASH_ATTR webServerBrowseFiles()
+{
+	EspFsIterator it;
+	espFsIteratorInit(userPageCtx, &it);
+	{
+		while( espFsIteratorNext(&it) )
+		{
+			if( strlen(it.name) >= 6 )
+			{
+				if( os_strcmp( it.name + strlen(it.name)-5, ".html" ) == 0 )
+				{
+					os_printf("%s\n", it.name); // TODO
+				}
+			}
+		}
+	}
+}
+
+void ICACHE_FLASH_ATTR webServerInit()
+{
+	espFsInit(userPageCtx, (void *)getUserPageSectionStart(), ESPFS_FLASH);
+	if( espFsIsValid( userPageCtx ) ) {
+		os_printf("Valid user file system found!\n");
+		webServerBrowseFiles();
+	}
+	else
+		os_printf("No user file system found!\n");
+}
+

web-server/web-server.h

@@ -0,0 +1,9 @@
+#ifndef WEB_SERVER_H
+#define WEB_SERVER_H
+
+#include <esp8266.h>
+
+void webServerInit();
+
+#endif /* WEB_SERVER_H */
+