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Fixed a bug with iOS Captive Portal Not Loading #271

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blackpressinc opened this issue Nov 22, 2023 · 8 comments
Open

Fixed a bug with iOS Captive Portal Not Loading #271

blackpressinc opened this issue Nov 22, 2023 · 8 comments

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@blackpressinc
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Sorry, I'm very new to github and I don't know how to do pull/push(?) requests. I was working on a project where I needed a captive portal to pop up in android and ios. By default the ESPUI does not pop up in iOS (Tested on my iphone 14). I fixed this by changing lines 1493 in ESPUI.ccp. iOS expects some content or else it wont follow the captive portal request. I just added a simple script to pop up a link followed by a redirect to the default ESPUI

server->onNotFound([this](AsyncWebServerRequest* request) {
    if (captivePortal)
    {
		AsyncResponseStream *response = request->beginResponseStream("text/html");
		response->print("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
		response->printf("<p>If site does not re-direct click here <a href='http://%s'>this link</a></p>", WiFi.softAPIP().toString().c_str());
		response->print("</body></html>");
		response->print("<head>");
		response->printf("<meta http-equiv=\"Refresh\" content=\"0; URL='http://%s'\" />", WiFi.softAPIP().toString().c_str());
		response->print("</head>");
		request->send(response);
		request->redirect("/");
    }
    else
    {
        request->send(404);
    }
});
@s00500
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s00500 commented Nov 22, 2023

Hey, that is a cool input. Please make a fork of the project, then make the change on your fork and finally open a Pull Request on github.

@AWSW-de
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AWSW-de commented Jan 5, 2024 •
edited
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Hello,
this is defenatelly a good bug fix which solved the problem for iOS and macOS for me too.
On Windows 10/11 it is still not showing the correct page, but this seems to be related to the Windows OS...

Thanks in advance for adding this to the general function. =)

@Jaykrishnak
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Hi AWSW-de, I have a similar challenge in Mac that captive portal not loading. could u please help me with that

@blackpressinc
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blackpressinc commented Jan 10, 2024 via email

@AWSW-de
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AWSW-de commented Jan 10, 2024

Hi AWSW-de, I have a similar challenge in Mac that captive portal not loading. could u please help me with that

Hi,
I just changed the lines 1493 in ESPUI.ccp like named in the 1st post from blackpressinc.

In my “void OfflinePotalSetup()“ in here https://github.com/AWSW-de/WordClock-16x16-LED-matrix-2023/blob/main/Code/Code.ino#L4298 You will find a working captive portal function.

@blackpressinc: If you like I can try to create the pull request for the change if you don’t find the time.

Hope to help.

Kind regards
AWSW

@Jaykrishnak
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Jaykrishnak commented Jan 10, 2024 •
edited
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how we can implement this in our mac through MDM?

@AWSW-de
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AWSW-de commented Jan 10, 2024 •
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how we can implement this in our mac through MDM?

Such captive portal actions are part of every modern operating system/browser.

They just try a bunch of known pages / URLs to see if this is a captive portal WiFi. The challenge seems to be that there is no full list of different URLs to react on - or let’s say I could not find one even with a long period of searching…

How it works (with this patch) with ESPUI is shown here: https://youtu.be/-pJWRE3K3IY?si=d-3nyKEezCBAAnmj&t=115

@MartinMueller2003
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Not sure how you are making your changes. ESPUI.cpp is only 1452 lines long.

I would propose this as an alternative coding that uses less ram at runtime.

        AsyncResponseStream *response = request->beginResponseStream("text/html");
        String responseText;
        responseText.reserve(1024);
        responseText += F("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
        responseText += ("<p>If site does not re-direct click here <a href='http://" +  WiFi.softAPIP().toString() + "'>this link</a></p>");
        responseText += ("</body></html><head><meta http-equiv=\"Refresh\" content=\"0; URL='http://" +  WiFi.softAPIP().toString() + "'\" /></head>");
        response->write(responseText.c_str(), responseText.length());
        request->send(response);
        request->redirect("/");

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5 participants
@s00500 @blackpressinc @MartinMueller2003 @AWSW-de @Jaykrishnak