How will I use host HTML on azure web app and use Ajax of HTML page to call another web app?

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MITRADebarthaGECoreTechCyber-2843 asked Jun 18, '20 MITRADebarthaGECoreTechCyber-2843 commented Jun 21, '20

How will I use host HTML on azure web app and use Ajax of HTML page to call another web app?

I am new in azure web app and having some issue with hosting HTML on azure portal and ajax call. I am having two critical issues.

First issue, I have a HTML page which I want to host on azure web app. Running the below code works but eventually it hosts my HTML on windows OS.

az webapp up -n surveyordemohtmlpage --html -g MyResource-Group --plan MyPlan -l westeurope

I have another flask app which I have hosted on linux OS in azure web app. So, I need to host the HTML with same os (linux) similar like flask web app.

The reason behind is that HTML page will call that flask web app using ajax. So, I think both needs to be in same domain.

Moving to my second issue, that how will I use ajax call in HTML page? should I use URL "https://myflaskapp.azurewebsites.net/flaskfunction" to call the flak web app?

Any suggestions will help here.

Thanks in advance.

azure-webapps azure-webapps-development

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Answer 1 · 2020-06-18T21:06:47.94Z

ryanchill answered Jun 18, '20 MITRADebarthaGECoreTechCyber-2843 commented Jun 21, '20

Hi @MITRADebarthaGECoreTechCyber-2843,

Since you app is flask app, you can add a requirements.txt to your root folder (if you haven't already) and run az webapp up -n surveyordemohtmlpage -g MyResource-Group --plan MyPlan -l westeurope.

Using ajax, make sure you have the js library referenced, <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> and towards the bottom of your html add

 $(document).ready(function() {
      $('form').on('submit', function(event) {
        $.ajax({
           data : {
              emailbody : $('#emailbody').val(),
              subject: $('#subject').val(),
                  },
              type : 'POST',
              url : 'https://myflaskapp.azurewebsites.net/flaskfunction'
             })
         .done(function(data) {
           Console.log(data);
       });
       event.preventDefault();
       });
 });

where /flaskfunction is

 @app.route('/flaskfunction','POST')
 def flaskfunction:
     """ Process the request body """

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MITRADebarthaGECoreTechCyber-2843 · Jun 19, 2020 at 08:03 AM

Do I need to place the static HTML page (from where I will use ajax to call the flask) in the same azure web app like flask app is in or I can place the HTML page in another web app and call the flask web app?
Please, let me know

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MITRADebarthaGECoreTechCyber-2843 · Jun 19, 2020 at 03:29 PM

@ryanchill I used storage account to host my HTML page and I am able to host it properly over there.
Now, I having issue with CORS . I have already enable the CORS in my ajax and also in my flask app.
I have tested the ajax scenario in two ways.

First, I just run my HTML page from my storage account and when I submit it shows me CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

In second way, I went to CORS section under API of my Flask web app on azure and put my storage account website link which is https://demohtmlstorageaccount.z6.web.core.windows.net and tested it. But, it didn't work and got issue that
<p>The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.</p>

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MITRADebarthaGECoreTechCyber-2843 MITRADebarthaGECoreTechCyber-2843 · Jun 19, 2020 at 03:31 PM

@ryanchill Can you please suggest me what mistake I am doing here.
I have put my ajax call code and flask app code for your reference

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MITRADebarthaGECoreTechCyber-2843 MITRADebarthaGECoreTechCyber-2843 · Jun 19, 2020 at 03:36 PM

see my ajax call below

var request = $.ajax({
type: "POST",
contentType: 'application/json; charset=utf-8',
url: " https://azuredemocalledflask.azurewebsites.net/testjson", // it's the URL
processData: false,
data: jsonstring, // serializes the form's elements
dataType: 'text',
async: false,
crossDomain: true,
contentType: 'application/json; charset=utf-8',
headers: { 'Access-Control-Allow-Origin':'*' },
success: function()
{
}
});
e.preventDefault();
request.fail(function( jqXHR, textStatus ) {
alert( "Request failed: " + textStatus );
});
request.done(function( msg ) {
console.log('Success');
$("#myElem").show();
setTimeout(function() { $("#myElem").hide(); }, 5000);
});

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ryanchill MITRADebarthaGECoreTechCyber-2843 · Jun 19, 2020 at 05:40 PM

@MITRADebarthaGECoreTechCyber-2843 and you enabled CORS on your flask API app service?

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MITRADebarthaGECoreTechCyber-2843 ryanchill · Jun 19, 2020 at 06:11 PM

@ryanchill I mean I have put the static website's link on the CORS section under API on azure portal , I didnt run the command manually. Do I need to run any command ? can you please check my code as well, i might make some mistakes in the code itself. thanks in advance

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