Example SDWebServer. When I try to open in a browser index.htm the port monitor displays the message "Sent less data than expected!"
dataFile: 1 dataType: text/html dataFile.size(): 451

I serve static html code directly from flash (PSTR()), for example an approx. 6KB big style.css file. But the html code is not sent beyond 5727 bytes.

The exact same html code worked on ESP8266.

For testing purposes is split the CSS file into two smaller parts, and everything started to work smoothly.

Task watchdog got triggered. The following tasks did not feed the watchdog in time:
Tasks currently running:
CPU 0: loopTask

This happens every 5 secs (Default) while running "HelloServer" Example on ESP32

the quickest fix i can think is to add

vTaskDelay(1 / portTICK_RATE_MS);

in loop()

If I try to go to http://captive.apple.com/hotspot-detect.html (which is how iPhones detect the presence of a captive portal), there is no response. It could be useful to add this feature to this library for ESP32.

in bool WebServer::_parseForm(WiFiClient& client, String boundary, uint32_t len) { there is a hard limit of 32 arguments in the form. unfortunately this is not guarded against and leads to silent memory corruption, if a form contains more. The crash will happen some time later at a completely unrelated place in the code.

I think this bug is present ever since in the WebServer also on the ESP8266.

Dynamically expanding the argument array might be overkill, but we could make the upper limit configurable and stop the parser when postArgsLen++ reaches that limit (also logging an error message)?

IMHO the semantics of HTTPupload.currentSize and HTTPupload.totalSize are wrong or at least highly misleading.

now we get the size of the last chunk of data in currentSize and the number of bytes received so far in totalSize. But currentSize as it is, is pretty useless and we really want the know how big the file is going to be once complete (for correct progress calculation and for checking filesystem requirements).

i suggest to make currentSize what totalSize is now and put the Content-Length header arg in totalSize.

does this sound reasonable?

Thanks for your contribution, as someone new to the ESP32 environment this set of WebServer examples was really helpful!

In using AdvancedWebServer, I have a bit of javascript to reload the SVG every 250msec, and then added in some quick code to receive data from a sensor and populate the graph with this data. Every 2000msec the data is read and stored in a buffer, and on request for the SVG the contents of the buffer are used for the Y values instead of the random values. I believe the code to read the sensor is fairly light weight (tens to a few hundred msec).

I've noticed that when actually reading real values, the server ends up missing most of the requests. It seems to work a bit better when reducing the update from 250msec to 1000msec, and placing the server and sensor code in separate FreeRTOS tasks doesn't appear to help much.

My question is: is there a canonical or suggested method for pairing this webserver with other tasks that require non-zero time, so that it doesn't miss requests?

thanks again,
Peter

209 output += entry.name(); del
209 output += String(entry.name()).substring(1); add

Hi.

Does serving static pages from SPIFFS work in this lib on the ESP32 ?

server.serveStatic("/", SPIFFS, "/index.htm"); 

I have a file index.htm on the / of the ESP but nothing happens when I call the server with a browser.

I think that the official repo has been created:
https://github.com/esp8266/ESPWebServer

Thank you very much for porting this to ESP32!

In one of my projects, I'm using ESPAsyncWebServer, which also defines a non-class enum for HTTP_GET, etc. I wanted to use WiFiManager as well, but since that pulls in WebServer, I was getting conflicts for these constants.

I re-defined these constants in WebServer_tng using enum class, which resolved the issue. Changes are here:

sidoh@75d2645

Happy to open a PR, but since this affects consumers (they'd need to reference these constants using the HTTPMethod:: namespace), I figured an issue would be more appropriate.

WebServer_tng

WebServer
update?

Update: upload_SPIFFS_esp32.ino.esp32.bin
Update Success: 530304 B
Download time: 59 sec.
Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:956
load:0x40078000,len:0
load:0x40078000,len:11904
entry 0x40078a3c

WebServer
update! 

ESPAsyncWebServer

AsyncWebServer
update?

Update Start: sketch_nov04a.ino.esp32.bin
Update Success: 515152 B
Download time: 1 sec.
Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:956
load:0x40078000,len:0
load:0x40078000,len:11904
entry 0x40078a3c

AsyncWebServer
update!

difference of 58 seconds, is this normal !?

WebServer.pcapng
AsyncWebServer.pcapng

ESP32
WebUpdate:40: error: 'Update' was not declared in this scope (add #include <Update.h> ?)
WebUpdate:46: error: 'stopAll' is not a member of 'WiFiUDP'
WebUpdate:48: error: 'class EspClass' has no member named 'getFreeSketchSpace'

esp32 wifiserver only has this

  WiFiServer(uint16_t port=80, uint8_t max_clients=4):sockfd(-1),_accepted_sockfd(-1),_port(port),_max_clients(max_clients),_listening(false),_noDelay(false){}

so :

WebServer::WebServer(IPAddress addr, int port)
: _server(addr, port)

set ports to ipaddr first octet xxx. instead of port

apply fix to parsearguments when no contentlength, same as esp8266

} else {
        // No content - but we can still have arguments in the URL.
        _parseArguments(searchStr);
      }

i get this error now ?

Arduino: 1.8.5 (Windows 10), Board: "ESP32 Dev Module, Disabled, Default, QIO, 80MHz, 4MB (32Mb), 921600, None"

In file included from C:\Users\Guest One\Documents\Arduino\libraries\WIFIMANAGER-ESP32-master\examples\AutoConnect\AutoConnect.ino:14:0:

C:\Users\Guest One\Documents\Arduino\libraries\WIFIMANAGER-ESP32-master/WiFiManager.h:36:22: error: 'const char HTTP_HEAD []' redeclared as different kind of symbol

const char HTTP_HEAD[] PROGMEM = "<html lang="en"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/><title>{v}</title>";

                  ^

In file included from C:\Users\Guest One\Documents\Arduino\hardware\espressif\esp32\libraries\WebServer\src/WebServer.h:30:0,

             from C:\Users\Guest One\Documents\Arduino\libraries\WIFIMANAGER-ESP32-master\examples\AutoConnect\AutoConnect.ino:12:

C:\Users\Guest One\Documents\Arduino\hardware\espressif\esp32\libraries\WebServer\src/HTTP_Method.h:10:3: note: previous declaration 'HTTPMethod HTTP_HEAD'

HTTP_HEAD = 0b00100000,

^

Multiple libraries were found for "WiFi.h"
Used: C:\Users\Guest One\Documents\Arduino\hardware\espressif\esp32\libraries\WiFi
Not used: C:\Program Files (x86)\Arduino\libraries\WiFi
Multiple libraries were found for "WebServer.h"
Used: C:\Users\Guest One\Documents\Arduino\hardware\espressif\esp32\libraries\WebServer
Not used: C:\Users\Guest One\Documents\Arduino\libraries\WebServer_tng-master
exit status 1
Error compiling for board ESP32 Dev Module.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

I uploaded the SDWebServer library to my NodeMCU. The server does start but on the server it shows 'SD card not Detected'. What changes should I make in the code?