- Thu Jan 05, 2017 9:40 am
#60470
Probably of no help to you, but it appears the LUA folks have solved the issue of large file transfers:
http://www.esp8266.com/viewtopic.php?p=39666However, while doing some google searches trying to find a ready-made answer, I did run across this post which I thought very interesting and maybe applicable to your situation:
http://www.esp8266.com/viewtopic.php?p=26486But, a subsequent qoogle result perhaps is an answer to your question:
http://www.esp8266.com/viewtopic.php?p=39952I didn't want to load the whole file at once since memory is so scarce, so I wound up just looking at how the WebServer library constructs its response, and sending the data one block at a time with the client's write() method.
... and finally the above chain led me to this
SD Card webserver - both read/write.Code: Select all/*
SDWebServer - Example WebServer with SD Card backend for esp8266
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
This file is part of the ESP8266WebServer library for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Have a FAT Formatted SD Card connected to the SPI port of the ESP8266
The web root is the SD Card root folder
File extensions with more than 3 charecters are not supported by the SD Library
File Names longer than 8 charecters will be truncated by the SD library, so keep filenames shorter
index.htm is the default index (works on subfolders as well)
upload the contents of SdRoot to the root of the SDcard and access the editor by going to http://esp8266sd.local/edit
*/
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <SPI.h>
#include <SD.h>
#define DBG_OUTPUT_PORT Serial
const char* ssid = "**********";
const char* password = "**********";
const char* host = "esp8266sd";
ESP8266WebServer server(80);
static bool hasSD = false;
File uploadFile;
void returnOK() {
server.send(200, "text/plain", "");
}
void returnFail(String msg) {
server.send(500, "text/plain", msg + "\r\n");
}
bool loadFromSdCard(String path){
String dataType = "text/plain";
if(path.endsWith("/")) path += "index.htm";
if(path.endsWith(".src")) path = path.substring(0, path.lastIndexOf("."));
else if(path.endsWith(".htm")) dataType = "text/html";
else if(path.endsWith(".css")) dataType = "text/css";
else if(path.endsWith(".js")) dataType = "application/javascript";
else if(path.endsWith(".png")) dataType = "image/png";
else if(path.endsWith(".gif")) dataType = "image/gif";
else if(path.endsWith(".jpg")) dataType = "image/jpeg";
else if(path.endsWith(".ico")) dataType = "image/x-icon";
else if(path.endsWith(".xml")) dataType = "text/xml";
else if(path.endsWith(".pdf")) dataType = "application/pdf";
else if(path.endsWith(".zip")) dataType = "application/zip";
File dataFile = SD.open(path.c_str());
if(dataFile.isDirectory()){
path += "/index.htm";
dataType = "text/html";
dataFile = SD.open(path.c_str());
}
if (!dataFile)
return false;
if (server.hasArg("download")) dataType = "application/octet-stream";
if (server.streamFile(dataFile, dataType) != dataFile.size()) {
DBG_OUTPUT_PORT.println("Sent less data than expected!");
}
dataFile.close();
return true;
}
void handleFileUpload(){
if(server.uri() != "/edit") return;
HTTPUpload& upload = server.upload();
if(upload.status == UPLOAD_FILE_START){
if(SD.exists((char *)upload.filename.c_str())) SD.remove((char *)upload.filename.c_str());
uploadFile = SD.open(upload.filename.c_str(), FILE_WRITE);
DBG_OUTPUT_PORT.print("Upload: START, filename: "); DBG_OUTPUT_PORT.println(upload.filename);
} else if(upload.status == UPLOAD_FILE_WRITE){
if(uploadFile) uploadFile.write(upload.buf, upload.currentSize);
DBG_OUTPUT_PORT.print("Upload: WRITE, Bytes: "); DBG_OUTPUT_PORT.println(upload.currentSize);
} else if(upload.status == UPLOAD_FILE_END){
if(uploadFile) uploadFile.close();
DBG_OUTPUT_PORT.print("Upload: END, Size: "); DBG_OUTPUT_PORT.println(upload.totalSize);
}
}
void deleteRecursive(String path){
File file = SD.open((char *)path.c_str());
if(!file.isDirectory()){
file.close();
SD.remove((char *)path.c_str());
return;
}
file.rewindDirectory();
while(true) {
File entry = file.openNextFile();
if (!entry) break;
String entryPath = path + "/" +entry.name();
if(entry.isDirectory()){
entry.close();
deleteRecursive(entryPath);
} else {
entry.close();
SD.remove((char *)entryPath.c_str());
}
yield();
}
SD.rmdir((char *)path.c_str());
file.close();
}
void handleDelete(){
if(server.args() == 0) return returnFail("BAD ARGS");
String path = server.arg(0);
if(path == "/" || !SD.exists((char *)path.c_str())) {
returnFail("BAD PATH");
return;
}
deleteRecursive(path);
returnOK();
}
void handleCreate(){
if(server.args() == 0) return returnFail("BAD ARGS");
String path = server.arg(0);
if(path == "/" || SD.exists((char *)path.c_str())) {
returnFail("BAD PATH");
return;
}
if(path.indexOf('.') > 0){
File file = SD.open((char *)path.c_str(), FILE_WRITE);
if(file){
file.write((const char *)0);
file.close();
}
} else {
SD.mkdir((char *)path.c_str());
}
returnOK();
}
void printDirectory() {
if(!server.hasArg("dir")) return returnFail("BAD ARGS");
String path = server.arg("dir");
if(path != "/" && !SD.exists((char *)path.c_str())) return returnFail("BAD PATH");
File dir = SD.open((char *)path.c_str());
path = String();
if(!dir.isDirectory()){
dir.close();
return returnFail("NOT DIR");
}
dir.rewindDirectory();
server.setContentLength(CONTENT_LENGTH_UNKNOWN);
server.send(200, "text/json", "");
WiFiClient client = server.client();
server.sendContent("[");
for (int cnt = 0; true; ++cnt) {
File entry = dir.openNextFile();
if (!entry)
break;
String output;
if (cnt > 0)
output = ',';
output += "{\"type\":\"";
output += (entry.isDirectory()) ? "dir" : "file";
output += "\",\"name\":\"";
output += entry.name();
output += "\"";
output += "}";
server.sendContent(output);
entry.close();
}
server.sendContent("]");
dir.close();
}
void handleNotFound(){
if(hasSD && loadFromSdCard(server.uri())) return;
String message = "SDCARD Not Detected\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += (server.method() == HTTP_GET)?"GET":"POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for (uint8_t i=0; i<server.args(); i++){
message += " NAME:"+server.argName(i) + "\n VALUE:" + server.arg(i) + "\n";
}
server.send(404, "text/plain", message);
DBG_OUTPUT_PORT.print(message);
}
void setup(void){
DBG_OUTPUT_PORT.begin(115200);
DBG_OUTPUT_PORT.setDebugOutput(true);
DBG_OUTPUT_PORT.print("\n");
WiFi.begin(ssid, password);
DBG_OUTPUT_PORT.print("Connecting to ");
DBG_OUTPUT_PORT.println(ssid);
// Wait for connection
uint8_t i = 0;
while (WiFi.status() != WL_CONNECTED && i++ < 20) {//wait 10 seconds
delay(500);
}
if(i == 21){
DBG_OUTPUT_PORT.print("Could not connect to");
DBG_OUTPUT_PORT.println(ssid);
while(1) delay(500);
}
DBG_OUTPUT_PORT.print("Connected! IP address: ");
DBG_OUTPUT_PORT.println(WiFi.localIP());
if (MDNS.begin(host)) {
MDNS.addService("http", "tcp", 80);
DBG_OUTPUT_PORT.println("MDNS responder started");
DBG_OUTPUT_PORT.print("You can now connect to http://");
DBG_OUTPUT_PORT.print(host);
DBG_OUTPUT_PORT.println(".local");
}
server.on("/list", HTTP_GET, printDirectory);
server.on("/edit", HTTP_DELETE, handleDelete);
server.on("/edit", HTTP_PUT, handleCreate);
server.on("/edit", HTTP_POST, [](){ returnOK(); }, handleFileUpload);
server.onNotFound(handleNotFound);
server.begin();
DBG_OUTPUT_PORT.println("HTTP server started");
if (SD.begin(SS)){
DBG_OUTPUT_PORT.println("SD Card initialized.");
hasSD = true;
}
}
void loop(void){
server.handleClient();
}
