Use JSONP to load an html page

javascript jquery ajax jsonp

22,154

Solution 1

http://en.wikipedia.org/wiki/JSONP#Script_element_injection

Making a JSONP call (in other words, to employ this usage pattern), requires a script element. Therefore, for each new JSONP request, the browser must add (or reuse) a new element—in other words, inject the element—into the HTML DOM, with the desired value for the "src" attribute. This element is then evaluated, the src URL is retrieved, and the response JSON is evaluated.

Now look at your error:

Uncaught SyntaxError: Unexpected token <

< is the first character of any html tag, probably this is the start of <DOCTYPE, in this case, which is, of course, invalid JavaScript.

And NO, you can't use JSONP for fetching html data.

Solution 2

I have done what you want but in my case I have control of the server side code that returns the HTML. So, what I did was wrapped the HTML code in one of the Json properties of the returned object and used it at client side, something like:

callback({"page": "<html>...</html>"})

The Syntax error you are facing it's because the library you're using expects json but the response is HTML, just that.

Solution 3

I've got three words for you: Same Origin Policy

Unless the remote URL actually supports proper JSONP requests, you won't be able to do what you're trying to. And that's a good thing.

Edit: You could of course try to proxy the request through your server …

Solution 4

If you really just want to employ the client to snag an HTML file, I suggest using flyJSONP - which uses YQL.. or use jankyPOST which uses some sweet techniques:

jankyPOST creates a hidden iframe and stuffs it with a form (iframe[0].contentWindow.document.body.form.name).

Then it uses HTML5 (watch legacy browsers!) webMessaging API to post to the other iframe and sets iframe's form elements' vals to what u specified.

Submits form to remote server...done.

Or you could just use PHP curl, parse it, echo it, so on.

IDK if what exactly ur using it for but I hope this helps.

ALSO... I'm pretty sure you can JSONP anything that is an output from server code. I did this with ClientLogin by just JSONPing their keyGen page and successfully consoleLogged the text even though it was b/w tags. I had some other errors on that but point is that I scraped that output.

Currently, I'm trying to do what you are so I'll post back if successful.

View more solutions

22,154

Author by

Korvin Szanto

I'm a Senior Developer for PortlandLabs, the company behind concrete5.

Updated on June 30, 2020

Comments

Korvin Szanto almost 4 years
I'm trying to load an external page using JSONP, but the page is an HTML page, I just want to grab the contents of it using ajax.

EDIT: The reason why I'm doing this is because I want to pass all the user information ex: headers, ip, agent, when loading the page rather than my servers.

Is this doable? Right now, I can get the page, but jsonp attempts to parse the json, returning an error: Uncaught SyntaxError: Unexpected token <

Sample code:
```
$.post('http://example.com',function(data){
    $('.results').html(data);
},'jsonp');
```
I've set up a jsfiddle for people to test with: http://jsfiddle.net/8A63A/1/