arduino-esp32
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espressif
HttpClient crashes after HTTP request
Board: ESP-WROOM-32 IDE name: Arduino IDE version 1.0.4 Flash Frequency: 80Mhz PSRAM enabled: No Upload Speed: 921600 Computer OS: Windows 10
Hi
Please bear with me, I'm completely new in this ESP32 world.
I'm trying to make a very simple HTTP request from my ESP32 towards a webserver which is running on a Raspberry Pi running Win 10 IOT, I have been banging my head for several hours and days trying to solve my problem below.
In most cases the code succeeds getting a response as expected, but when I call http.end() it crashes, sometimes with Guru Meditation Error: Core 1 panic'ed (InstrFetchProhibited), other times with (LoadProhibited).
If I instead use any other URLs instead of my own webserver, everything works fine. When I test the URL of my Raspberry PI webserver with a normal internet browser on my PC, or using Fiddler everything works fine too.
The strange thing is that it only crashes when it sends a http req to my homemade webserver, it works fine with all other webservers.
I double checked my http header from the server, and also added "Content-Type: text/html" "Date:....." and "Server:..." to the header.
Further more I checked the header and html response using a program called Fiddler and using FireFoxs Inspector tool, and I really can't see any problem with it, but there must be something in the response from my webserver causing the crash
#include <WiFi.h>
#include <HTTPClient.h>
const char* ssid = "mySSID";
const char* password = "myPassword";
void setup(void)
{
Serial.begin(9600);
delay(4000);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Waiting for Wifi");
}
Serial.println("Wifi connected");
delay(1000);
}
void loop()
{
if ((WiFi.status() == WL_CONNECTED)) //Check the current connection status
{
HTTPClient http;;
bool httpInitResult = http.begin("http://192.168.0.105:485/esp32.html");
http.addHeader("Content-Type", "text/html");
if( httpInitResult == false )
{
Serial.println("http.begin() failed!");
}
else
{
int httpCode = http.GET();
Serial.print("httpCode: ");
Serial.println(httpCode);
if (httpCode > 0) //Check for the returning code
{
String payload = http.getString();
Serial.print("Payload: ");
Serial.println(payload);
}
else
{
Serial.println("Error on HTTP request");
}
}
Serial.println("Trace just before http.end()");
http.end(); //Free the resources
Serial.println("Trace just after http.end()");
}
delay(1000);
}
Output from Serial monitor with debug traces enabled:
15:36:22.978 -> Waiting for Wifi
15:36:22.978 -> Wifi connected
15:36:23.934 -> [V][HTTPClient.cpp:235] beginInternal(): url: http://192.168.0.105:485/esp32.html
15:36:24.034 -> [D][HTTPClient.cpp:276] beginInternal(): host: 192.168.0.105 port: 485 url: /esp32.html
15:36:24.135 -> [D][HTTPClient.cpp:1025] connect(): connected to 192.168.0.105:485
15:36:24.382 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'HTTP/1.1 200 OK'
15:36:24.471 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Length: 148'
15:36:24.552 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Type: text/html'
15:36:24.633 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Server: rpi'
15:36:24.715 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Date: Thu, 23 Jan 2020 14:36:23 GMT'
15:36:24.796 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Connection: close'
15:36:24.877 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: ''
15:36:24.959 -> [D][HTTPClient.cpp:1158] handleHeaderResponse(): code: 200
15:36:25.000 -> [D][HTTPClient.cpp:1161] handleHeaderResponse(): size: 148
15:36:25.081 -> [D][HTTPClient.cpp:1295] writeToStreamDataBlock(): connection closed or file end (written: 148).
15:36:25.163 -> [D][HTTPClient.cpp:370] disconnect(): tcp stop
15:36:25.246 ->
15:36:25.246 -> Payload: <!doctype html><html lang="en"><head><meta charset="utf-8"><title>Esp32</title></head><body><p>2020-01-23 15:36:23;23.13;4.63;2.3;</p></body></html>
15:36:25.399 -> Trace just before http.end()
15:36:25.399 -> [D][HTTPClient.cpp:383] disconnect(): tcp is closed
15:36:25.500 ->
15:36:26.350 -> [V][HTTPClient.cpp:235] beginInternal(): url: http://192.168.0.105:485/esp32.html
15:36:26.450 -> [D][HTTPClient.cpp:276] beginInternal(): host: 192.168.0.105 port: 485 url: /esp32.html
15:36:26.504 -> [D][HTTPClient.cpp:1025] connect(): connected to 192.168.0.105:485
15:36:26.851 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'HTTP/1.1 200 OK'
15:36:26.952 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Length: 148'
15:36:27.005 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Type: text/html'
15:36:27.106 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Server: rpi'
15:36:27.152 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Date: Thu, 23 Jan 2020 14:36:26 GMT'
15:36:27.253 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Connection: close'
15:36:27.353 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: ''
15:36:27.406 -> [D][HTTPClient.cpp:1158] handleHeaderResponse(): code: 200
15:36:27.453 -> [D][HTTPClient.cpp:1161] handleHeaderResponse(): size: 148
15:36:27.507 -> [D][HTTPClient.cpp:1295] writeToStreamDataBlock(): connection closed or file end (written: 148).
15:36:27.607 -> [D][HTTPClient.cpp:370] disconnect(): tcp stop
15:36:27.707 ->
15:36:27.707 -> Payload: <!doctype html><html lang="en"><head><meta charset="utf-8"><title>Esp32</title></head><body><p>2020-01-23 15:36:25;23.13;4.63;2.3;</p></body></html>
15:36:27.839 -> Trace just before http.end()
15:36:27.886 -> Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
15:36:27.970 -> Core 1 register dump:
15:36:27.970 -> PC : 0x4015d4d8 PS : 0x00060430 A0 : 0x800d36db A1 : 0x3ffb1e80
15:36:28.109 -> A2 : 0x3ffb1f10 A3 : 0x00000002 A4 : 0x0000001c A5 : 0x0000ff00
15:36:28.155 -> A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x800d6591 A9 : 0x3ffb1e60
15:36:28.256 -> A10 : 0x3ffbda34 A11 : 0x3f40240a A12 : 0x00000002 A13 : 0x0000ff00
15:36:28.356 -> A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x0000001c
15:36:28.456 -> EXCVADDR: 0x00000012 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
15:36:28.557 ->
15:36:28.557 -> Backtrace: 0x4015d4d8:0x3ffb1e80 0x400d36d8:0x3ffb1ea0 0x400d37a9:0x3ffb1ec0 0x400d1ba6:0x3ffb1ee0 0x400d7775:0x3ffb1fb0 0x40088b9d:0x3ffb1fd0
15:36:28.710 ->
15:36:28.710 -> Rebooting...
15:36:28.710 -> 1⸮⸮⸮⸮VŌHT⸮⸮Xl@⸮[D][WiFiGeneric.cpp:337] _eventCallback(): Event: 0 - WIFI_READY
15:36:33.174 -> [D][WiFiGeneric.cpp:337] _eventCallback(): Event: 2 - STA_START
15:36:33.328 -> [D][WiFiGeneric.cpp:337] _eventCallback(): Event: 4 - STA_CONNECTED
15:36:33.629 -> [D][WiFiGeneric.cpp:337] _eventCallback(): Event: 7 - STA_GOT_IP
15:36:33.676 -> [D][WiFiGeneric.cpp:381] _eventCallback(): STA IP: 192.168.0.112, MASK: 255.255.255.0, GW: 192.168.0.1
15:36:34.130 -> Waiting for Wifi
15:36:34.130 -> Wifi connected
15:36:35.132 -> [V][HTTPClient.cpp:235] beginInternal(): url: http://192.168.0.105:485/esp32.html
15:36:35.232 -> [D][HTTPClient.cpp:276] beginInternal(): host: 192.168.0.105 port: 485 url: /esp32.html
15:36:37.038 -> [D][HTTPClient.cpp:1025] connect(): connected to 192.168.0.105:485
15:36:37.393 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'HTTP/1.1 200 OK'
15:36:37.493 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Length: 148'
15:36:37.540 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Content-Type: text/html'
15:36:37.641 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Server: rpi'
15:36:37.694 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Date: Thu, 23 Jan 2020 14:36:36 GMT'
15:36:37.794 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: 'Connection: close'
15:36:37.895 -> [V][HTTPClient.cpp:1123] handleHeaderResponse(): RX: ''
15:36:37.941 -> [D][HTTPClient.cpp:1158] handleHeaderResponse(): code: 200
15:36:37.995 -> [D][HTTPClient.cpp:1161] handleHeaderResponse(): size: 148
15:36:38.095 -> [D][HTTPClient.cpp:1295] writeToStreamDataBlock(): connection closed or file end (written: 148).
15:36:38.164 -> [D][HTTPClient.cpp:370] disconnect(): tcp stop
15:36:38.233 ->
15:36:38.233 -> Payload: <!doctype html><html lang="en"><head><meta charset="utf-8"><title>Esp32</title></head><body><p>2020-01-23 15:36:36;23.13;4.63;2.3;</p></body></html>
15:36:38.370 -> Trace just before http.end()
15:36:38.404 -> Guru Meditation Error: Core 1 panic'ed (IllegalInstruction). Exception was unhandled.
15:36:38.496 -> Core 1 register dump:
15:36:38.543 -> PC : 0x54000000 PS : 0x00060430 A0 : 0x800d36db A1 : 0x3ffb1e80
15:36:38.644 -> A2 : 0x3ffb1f10 A3 : 0x54000000 A4 : 0x0000001c A5 : 0x0000ff00
15:36:38.744 -> A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x8015d4de A9 : 0x3ffb1e60
15:36:38.797 -> A10 : 0x3ffbdaf0 A11 : 0x3f40240a A12 : 0x00000002 A13 : 0x0000ff00
15:36:38.898 -> A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x00000000
15:36:38.998 -> EXCVADDR: 0x00000000 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
15:36:39.098 ->
15:36:39.098 -> Backtrace: 0x54000000:0x3ffb1e80 0x400d36d8:0x3ffb1ea0 0x400d37a9:0x3ffb1ec0 0x400d1ba6:0x3ffb1ee0 0x400d7775:0x3ffb1fb0 0x40088b9d:0x3ffb1fd0
15:36:39.246 ->
15:36:39.246 -> Rebooting...
15:36:39.299 ->
Output from ESP Exception decoder:
Decoding stack results
0x4015d4d8: HTTPClient::connected() at C:\Users\kfj41\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src\HTTPClient.cpp line 395
0x400d36d8: HTTPClient::disconnect(bool) at C:\Users\kfj41\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src\HTTPClient.cpp line 359
0x400d37a9: HTTPClient::end() at C:\Users\kfj41\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src\HTTPClient.cpp line 347
0x400d1ba6: loop() at C:\Users\kfj41\Documents\Arduino\Display SPI test\TFT_eSPI_WiFi_Http_req_5 without display\TFT_eSPI_WiFi_Http_req_4/TFT_eSPI_WiFi_Http_req_4.ino line 60
0x400d7775: loopTask(void*) at C:\Users\kfj41\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32\main.cpp line 19
0x40088b9d: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143
If you change the http.end to:
if (http.connected()) http.end();
do you get an exception?
if (http.connected()) http.end();
Ibernstone, I tried your suggestion, but unfortunately it didn't solve the problem.
Adding more traces shown that the ESP32 often crashes before the http.end() is called at all
Could the error be related to that I am using a fixed IP address instead of a domain name, and no DNS lookup is done?
Anybody able to help here?
I would really appriciate some help with this.
Thanks in advance
I can't reproduce this (with the URL changed to https://jigsaw.w3.org/HTTP/300/Overview.html)
Can you share how the server is configured so I can try to set that up here? (its a Raspberry Pi?)
Liebman, yes it is a Raspberry Pi running Windows 10 IoT
I inserted details below, do you need anything else?
Header from Fiddler
HTTP/1.1 200 Connection Established Content-Length: 148 Content-Type: text/html Server: rpi Date: Sun, 02 Feb 2020 15:54:59 GMT Connection: close
Raw content from Fiddler: HTTP/1.1 200 Connection Established Content-Length: 148 Content-Type: text/html Server: rpi Date: Sun, 02 Feb 2020 15:54:59 GMT Connection: close
2020-02-02 16:54:59;23.88;3.56;2.3;
OK, I won't be loading Windows IoT on my Pi. I'll set the web server on it up with something that looks similar-ish.
Great, I really appreciate that.
The raw content in my original post doesn't look correctly, since the html part isn't shown as I have written it, but I guess that is not so important, since I have validated the html content
I've been unable to duplicate the crash with current git version and apache2 configured on a Pi with: (/etc/apache2/sites-enabled/001-esp32.conf )
Listen 485
<VirtualHost *:485>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
and the html file: (/var/www/html/esp32.html )
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>esp32 test</title>
</head>
<body>
This is a test.
</body>
</html>
Liebman
Thank you so much for your support, I really appreciate it.
I have an extra Raspberry PI laying around, so I will try your example above on that one, it looks fairly simple.
Have you run it on Rasbbian on your Raspberry PI, and can I just install it via NOOBS?
After a lot of trial and error I managed to get the Apache webserver up and running on Raspbian, and I agree, things worked fine using this webserver, the ESP32 didn't crash here.
I noticed that my old server used the following in the http header: Connection: close
But the Apache webserver used: Keep-Alive: timeout=5, max=100 Connection: Keep-Alive
I tried using the same in the header from my original webserver, and voila, now the ESP32 didn't crash anymore.
This is a workaround I easily can live with permanently, but I guess it's something the httpCLient should be robust for, and not crash.
But thank you very much Liebman, so nice to get the problem solved.
I'll change the apache configuration I used to disable keep-alive and see if I can reproduce the issue.
Same issue. I'm not sure how to change the header from my server. :-( Mostly on http.end() but occasionally elsewhere.
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x4015c69c PS : 0x00060630 A0 : 0x800d329a A1 : 0x3ffb1ef0
A2 : 0x3ffc106c A3 : 0x00000000 A4 : 0x00000004 A5 : 0x0000ff00
A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x800d50c1 A9 : 0x3ffb1ed0
A10 : 0x3ffba860 A11 : 0x3f4015f2 A12 : 0x00000002 A13 : 0x0000ff00
A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x0000001b EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000010 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
Backtrace: 0x4015c69c:0x3ffb1ef0 0x400d3297:0x3ffb1f10 0x400d3309:0x3ffb1f30 0x400d1a32:0x3ffb1f50 0x400d1b5a:0x3ffb1f90 0x400d62bd:0x3ffb1fb0 0x40088b9d:0x3ffb1fd0
Rebooting...
I'm using a hosted web server. Not sure I can change the header. Wouldn't know how if I could.
Looks like I have a similar Problem. but in my case it triggers InstrFetchProhibited. the backtrace initial pointed to the display u8x8. but esp32 crashes also without display.
Hello, I'm also experiencing similar issues. Board: DOIT ESP32 DEVKIT V1 IDE name: Arduino IDE version 1.8.12 Flash Frequency: 80Mhz Upload Speed: 921600 Computer OS: Ubuntu 18.04.4 LTS
My application is to POST a json file to a webpage. Everything works fine using arduino-eps32 v1.0.2 but when using v1.0.3 and 1.0.4 it fails with:
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x400d4bba PS : 0x00060430 A0 : 0x800d1cc0 A1 : 0x3ffb1e20
A2 : 0x3ffb1f10 A3 : 0x00000000 A4 : 0x0000000a A5 : 0x3ffc1670
A6 : 0x3f40327e A7 : 0xffffffff A8 : 0x800d695c A9 : 0x3ffb1e00
A10 : 0x3ffcb6ac A11 : 0x3ffbf448 A12 : 0x0000000a A13 : 0x3f40239f
A14 : 0x00000000 A15 : 0x0000002e SAR : 0x00000004 EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000038 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
Backtrace: 0x400d4bba:0x3ffb1e20 0x400d1cbd:0x3ffb1e40 0x400d7739:0x3ffb1fb0 0x40088b9d:0x3ffb1fd0
Sometimes it works without problem on first run but fails in the second loop (it also seems to depend on completely unrelated code executed after http.end()).
Minimum example of the code showing the issue is:
#include "WiFi.h"
#include <HTTPClient.h>
#include "base64.h"
// WIFI settings
const char* ssid = "MySSID";
const char* password = "MyPassword";
// website authentication
String authUsername = "MyUser";
String authPassword = "MyPassword";
void connectWiFi(){
// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.println("Connecting to WiFi..");
delay(1000);
}
}
void setup() {
// put your setup code here, to run once:
// Serial port for debugging purposes
Serial.begin(115200);
// Connect to Wi-Fi
connectWiFi();
}
void loop() {
if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status
Serial.println("++++++++++++++++++++++ Starting round ++++++++++++++++++++++");
char buffer[100] = "{\"location\":\"esp32\",\"temperature\":42.42,\"humidity\":42.42}";
Serial.println(buffer);
// transfer
HTTPClient http;
http.begin("http://sub.domain.com/writeData.php");
http.addHeader("Content-Type", "application/json");
String auth = base64::encode(authUsername + ":" + authPassword);
http.addHeader("Authorization", "Basic " + auth);
int httpResponseCode = http.POST(buffer);
String response = http.getString();
delay(5000);
Serial.println(httpResponseCode);
Serial.println(response);
Serial.println("---------------- Done with round ---------------------");
http.end();
delay(5000);
Serial.println(httpResponseCode);
Serial.println("----------- Really done with round -----------------");
if ( httpResponseCode == 200 ){
Serial.println("Success!");
delay(5000);
}
}
Serial.println("Sleeping...");
delay(5000);
Serial.println("############# Totally done with round ############");
}
The response from the webserver to the POST request is: Header:
HTTP/1.1 200 OK
Date: Sat, 04 Apr 2020 18:27:54 GMT
Server: Apache
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
Message:
New records created successfully
writeData.php
I would appreciate any hint on how this issue could be solved, I already spent hours on it with no outcome. Best regards, Martin
https://github.com/espressif/arduino-esp32/commit/7d7824701fe5e22f08555d3e1ce3180a922b2151#r39308827 maybe related?
update: that was changed again afterwards: https://github.com/espressif/arduino-esp32/commit/f4acac4c2bf83d76f49241489e24fc1d6bbb64e7#diff-39b6d5e36cff20acc96b42ef19ad4deb
recent fixes, needs checking: https://github.com/esp8266/Arduino/pull/6476
if have the impression that the esp8266 HTTPClient is getting fixes, but the esp32 incarnation misses some. @Jeroen88 could that be the root cause of this issue?
[STALE_SET] This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.
![stale[bot] avatar](https://avatars.githubusercontent.com/in/1724?v=4 "Published by a pub.dev verified publisher"){kind=small}
Maybe usage of stalebot should be reconsidered. It is pointless and even harmful to close unfixed bugs (or like in this case, make people making pointless posts just to avoid closure).
[STALE_CLR] This issue has been removed from the stale queue. Please ensure activity to keep it openin the future.
I get the same crash whenever I connect to a webserver that sends the header "connection: close". The crash happens on the second iteration of the loop (the second time connecting). It doesn't happen when I connect to a webserver that doesn't send that header.
Does anyone have any ideas?
Unfortunately I don't have control over the webserver, it's the webserver built into a weather station.
Stripped down code:
// Import required libraries for wifi
#ifdef ESP32
#include <WiFi.h>
#include <WiFiMulti.h>
#else
# these are untested, I've only tested with an ESP32
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <Hash.h>
#include <ESPAsyncTCP.h>
#endif
#include <HTTPClient.h>
// init wifimulti (lets us specify multiple ssid's)
WiFiMulti wifiMulti;
void setup(){
Serial.begin(115200);
delay(10);
Serial.println("Starting up!");
// specify SSIDs (these must be 2.4ghz networks)
wifiMulti.addAP("put ssid here", "put password here");
// (Note that must run wifiMulti.run() here or it will reset in a loop...)
Serial.println("Connecting Wifi...");
if(wifiMulti.run() == WL_CONNECTED) {
Serial.println("");
Serial.print("WiFi connected! ");
Serial.print( WiFi.SSID().c_str() );
Serial.print(" ");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
}
}
void loop(){
delay(1000);
if(wifiMulti.run() == WL_CONNECTED) {
HTTPClient http;
// crashes! (because sends header "connection:close")
String airlinkURL = "http://10.10.10.51/v1/current_conditions";
// works! (because doesn't send header "connection:close") (it sends "Connection: Keep-Alive")
//String airlinkURL = "http://sinkingsensation.com/aqi/get_json.php";
Serial.print("Getting data from Airlink: ");
Serial.println(airlinkURL);
http.begin(airlinkURL.c_str());
int httpResponseCode = http.GET();
if (httpResponseCode>0) {
Serial.print("HTTP Response code: ");
Serial.println(httpResponseCode);
String payload = http.getString();
// causes crash?
//Serial.println(payload);
}
else {
Serial.print("Error connecting to the AirLink: ");
Serial.println(httpResponseCode);
}
http.end();
delay(5000);
} // end if connected
}
Aha, I found a workaround. It's ugly, but it seems to work.
I had to modify HTTPClient.cpp, which on my Windows system is in C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src.
Comment out these lines, or change the conditional or comment out "_canReuse = false;":
if(_canReuse && headerName.equalsIgnoreCase("Connection")) {
if(headerValue.indexOf("close") >= 0 && headerValue.indexOf("keep-alive") < 0) {
_canReuse = false;
}
}
I'm glad to test any changes or alternative versions with this webserver, if anyone needs just let me know.
Thank you @wrybread. I had problems with crashing http.end(), but your method solved the issue
Hi, was having the same exception issues and managed to solve it by using a different begin function:
const char *_url = "http://192.168.1.1/getstuff";
WiFiClient client;
HTTPClient http;
http.begin(client,_url);
if( http.GET() )
{
String payload = http.getString();
Serial.println(payload);
payload = String();
}
http.end();
@apreb that rather looks like some testing code than a modified begin function. Copy&Paste gone wrong?
not really, the code snippet is what is needed to request a GET on the resource and printing back results to the console, without crashing.
Aha, I found a workaround. It's ugly, but it seems to work.
I had to modify HTTPClient.cpp, which on my Windows system is in C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src.
Comment out these lines, or change the conditional or comment out "_canReuse = false;":
if(_canReuse && headerName.equalsIgnoreCase("Connection")) { if(headerValue.indexOf("close") >= 0 && headerValue.indexOf("keep-alive") < 0) { _canReuse = false; } }I'm glad to test any changes or alternative versions with this webserver, if anyone needs just let me know.
I came across the same event today, so I searched and arrived at this issue. I confirmed that the reboot was 100%( request times =178/178) gone with the above fix. Thank you very much.
--- Devices esp32(Http Server and REST API(getting BME280 info)) <--> esp32 (HttpClient. http.GET() 178 times)
Aha, I found a workaround. It's ugly, but it seems to work.
I had to modify HTTPClient.cpp, which on my Windows system is in C:\Users\USERNAME\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\HTTPClient\src.
Comment out these lines, or change the conditional or comment out "_canReuse = false;":
if(_canReuse && headerName.equalsIgnoreCase("Connection")) { if(headerValue.indexOf("close") >= 0 && headerValue.indexOf("keep-alive") < 0) { _canReuse = false; } }I'm glad to test any changes or alternative versions with this webserver, if anyone needs just let me know.
Thankyou!
Hi to all, I have this crash as well while sending a POST request to the wrong server, which returns a 404 error. I tried @wrybread hack but didn't solve the issue. Of course I will fix the server issue, but I wish the ESP32 side was more fault tolerant. The server headers output is:
HTTP/1.1 404 Not Found
Connection: Keep-Alive
Transfer-Encoding: chunked
Keep-Alive: timeout=20
X-Frame-Options: SAMEORIGIN
Content-Type: text/html
X-DNS-Prefetch-Control: off
The code is compiled in PlaftormIO, using framework ESP32 1.0.4
Here's the output:
[HTTP] begin...
http://192.168.1.1/table-update
[HTTP] POST...
[E][WiFiClient.cpp:436] read(): fail on fd 54, errno: 104, "Connection reset by peer"
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x40155e84 PS : 0x00060230 A0 : 0x8015624c A1 : 0x3ffb1b90
A2 : 0x00000000 A3 : 0x3ffb1bef A4 : 0x00000001 A5 : 0x00000001
A6 : 0x3ffc1904 A7 : 0x00000068 A8 : 0x00000000 A9 : 0x00000000
A10 : 0x0022c4f3 A11 : 0x40085fe4 A12 : 0x00000050 A13 : 0x00000000
A14 : 0x0022c4f3 A15 : 0x00000000 SAR : 0x0000000a EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000008 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff
Backtrace: 0x40155e84:0x3ffb1b90 0x40156249:0x3ffb1bb0 0x40185dce:0x3ffb1be0 0x400d6b9d:0x3ffb1c10 0x400d6c35:0x3ffb1c30 0x400d5911:0x3ffb1c50 0x400d60a3:0x3ffb1cd0 0x400d610f:0x3ffb1d10 0x400d6133:0x3ffb1d30 0x400d3121:0x3ffb1d50 0x400d3e1e:0x3ffb1f90 0x400d9531:0x3ffb1fb0 0x40089c6d:0x3ffb1fd0
and here's the decoded backtrace:
PC: 0x40155e84: WiFiClientRxBuffer::read(unsigned char*, unsigned int) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\WiFi\src\WiFiClient.cpp line 107
EXCVADDR: 0x00000008
Decoding stack results
0x40155e84: WiFiClientRxBuffer::read(unsigned char*, unsigned int) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\WiFi\src\WiFiClient.cpp line 107
0x40156249: WiFiClient::read(unsigned char*, unsigned int) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\WiFi\src\WiFiClient.cpp line 434
0x40185dce: WiFiClient::read() at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\WiFi\src\WiFiClient.cpp line 345
0x400d6b9d: Stream::timedRead() at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\cores\esp32\Stream.cpp line 36
0x400d6c35: Stream::readStringUntil(char) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\cores\esp32\Stream.cpp line 287
0x400d5911: HTTPClient::handleHeaderResponse() at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\HTTPClient\src\HTTPClient.cpp line 1118
0x400d60a3: HTTPClient::sendRequest(char const*, unsigned char*, unsigned int) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\HTTPClient\src\HTTPClient.cpp line 573
0x400d610f: HTTPClient::POST(unsigned char*, unsigned int) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\HTTPClient\src\HTTPClient.cpp line 493
0x400d6133: HTTPClient::POST(String) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\libraries\HTTPClient\src\HTTPClient.cpp line 498
0x400d3121: wifiTransmission() at C:/Users/proprietario/zzz/projects/Active Projects/xxx/Electronics/Firmware/yyy/Table-FW/src/main.ino line 400
0x400d3e1e: loop() at C:/Users/proprietario/zzz/projects/Active Projects/xxx/Electronics/Firmware/yyy/Table-FW/src/main.ino line 316
0x400d9531: loopTask(void*) at C:\Users\proprietario\.platformio\packages\framework-arduinoespressif32\cores\esp32\main.cpp line 19
0x40089c6d: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143
