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angular 2 post to a database works on firefox but not on chrome

Posted on 2016-07-28
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Last Modified: 2016-08-05
so this drive me insane :)
the same code work on firefox but not on chrome.

i test angular 2 "ajax calls", this time sending data to insert into the database, and send back the inserted item.

so this is in the service:
  addUser(){
    var theparams = JSON.stringify({
      name: "fabian",
      address: "dizingoff 99, NY",
      lat: 33.060143,
      lng: 39.770557
    });
    var params = 'user=' + theparams;
    var headers = new Headers();
    headers.append('Content-type', 'application/x-www-form-urlencoded');

    return this._http.post('http://localhost:80/ang2router/public/addContact.php', params,{
      headers: headers
    })
    .map(res => res.json());

  }

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this is hard coded for testing obviously.
then i call it on a button click:
      this._httpsService.addUser()
      .subscribe(
        data => this.postData = data,
        error => alert(error),
        () => console.log("Finished")
      );

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then the php file that insert it into the database and get it back:
$value = json_decode($_POST['user']);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
//var_dump($value->name);

        $db_name  = 'mydb';
        $hostname = 'localhost';
        $username = 'myusername';
        $password = 'mypass';

        // connect to the database
       $dbh = new PDO("mysql:host=$hostname;dbname=$db_name", $username, $password);



    // a query get all the records from the users table
    $sql = 'INSERT INTO markers ( name, address,lat, lng ) 
        VALUES ( "' . $value->name .'" , "'.$value->address.'", '.$value->lat.' , '.$value->lng.' );';

    
    $stmt = $dbh->prepare( $sql );

   
    $check = $stmt->execute();

    $last_id = $dbh->lastInsertId();

    $sql2 = "SELECT * FROM markers WHERE id=$last_id ";

   
    $stmt = $dbh->prepare( $sql2 );

    
    $stmt->execute();

    // fetch the results into an array
    $result = $stmt->fetchAll( PDO::FETCH_ASSOC );
                                                        
    echo json_encode($result);

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in firefox all goes well, the data is in the database and i get the last inserted id back.
but on chrome not. i attach what i get on chrome.

best regards
Screenshot--65-.png
Screenshot--66-.png
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Question by:derrida
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16 Comments
 
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Expert Comment

by:Dave Baldwin
ID: 41733631
Chrome doesn't like 'localhost' for a number of functions including cookies.  Try changing your links to the IP address of the machine and see if that works.  I only use 'localhost' when it is actually required.  I normally use the machine IP address because then the pages are accessible from other machines on the network.
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Author Comment

by:derrida
ID: 41733694
hi
no change. and add to it that if i don't do a switch statement it works. but once i use that post veriable, it works of FF but not on chrome.
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Expert Comment

by:Dave Baldwin
ID: 41733699
What 'switch statement'?
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LVL 1

Author Comment

by:derrida
ID: 41733718
sorry, that was about another issue i have :) forget about the switch statement.
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Author Comment

by:derrida
ID: 41734199
so when i var_dump my $_POST array:
in chrome: array(0) {
}
empty.
in firefox:
array(1) {
  ["user"]=>
  string(82) "{"name":"Moses","address":"dizingoff 29, NY","lat":23.060143,"lng":29.770557}"
}
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LVL 83

Expert Comment

by:Dave Baldwin
ID: 41734232
For test purposes, I would create an HTML form page and see what you get when you submit that.  Like below... note that I put quotes around the "lat / lon" values to get it to work.  It works the same in both Firefox and Chrome.

ChromePOSTtest.html
<!DOCTYPE html>
<html>
<head>
<title>Chrome POST test form</title>
</head>
<body>
<h1>Chrome POST test form</h1>
<form action="addContact.php" method="post">
<input type="text" name="user" value='{"name":"Moses","address":"dizingoff 29, NY","lat":"23.060143","lng":"29.770557"}' />
<input type="submit" name="submit" value="submit" />
</form>
</body>
</html>

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addContact.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<title>addContact.php</title>
</head>
<body>
<?php 
$value = json_decode($_POST['user']);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
var_dump($_POST['user']);
var_dump($value);
?>
</body>
</html>

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Assisted Solution

by:Dave Baldwin
Dave Baldwin earned 500 total points
ID: 41734241
Let's try this again, I might have found something.  I added the 'true' option to 'json_decode' and it seems to work without the quotes.  It now shows the lat/lon as floats in both browsers.

ChromePOSTtest1.html
<!DOCTYPE html>

<html>
<head>
<title>Chrome POST test form</title>
</head>
<body>
<h1>Chrome POST test1 form</h1>
<form action="addContact.php" method="post">
<input type="text" name="user" value='{"name":"Moses","address":"dizingoff 29, NY","lat":23.060143,"lng":29.770557}' />
<input type="submit" name="submit" value="submit" />
</form>
</body>
</html>

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addContact.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<title>addContact.php</title>
</head>
<body>
<?php 
$value = json_decode($_POST['user'], true);
header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Headers: X-Requested-With');
header('Content-Type: application/json');
var_dump($_POST['user']);
var_dump($value);
?>
</body>
</html>

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From http://php.net/manual/en/function.json-decode.php ...
assoc

    When TRUE, returned objects will be converted into associative arrays.
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Author Comment

by:derrida
ID: 41734249
well yes, it does work, in that "regular" way ( by the way, with quotes or without the added quotes).
But once I do that in the angular 2 way, works in FF but not in chrome. notice that i'm hard coding the values, since I just want to learn to pass the data in the angular 2 way.

I have no idea why it is passed in FF but not in chrome.
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 41734260
Are you going to try adding 'true' to the json_decode statement?  I'm not going to try to duplicate your angular code because most of is not posted and I don't have your database.  For testing I always simplify things to something that works and work from there to build something more complicated.
0
 
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Author Comment

by:derrida
ID: 41734266
oh i have tried it with the true. same thing: works on FF not in chrome.
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 41734271
Then you need to make a test version of your code that is as simple as possible so you can figure out what is and isn't working.  Maybe an 'angular' version of my demo programs.  After all Chrome works, Firefox works, PHP works.  It's just the combination with your code that isn't working.
0
 
LVL 1

Author Comment

by:derrida
ID: 41734470
so fixed it. and i put it here for anyone else who will encounter the issue.

the problem is that the post array in php expect a key value pair. and that's not what i sent.
so you either send a key value pairs, or if you want to keep the json format, in your php, since there is no key, do:
$theobject = json_decode(key($_POST));
echo $theobject->action;

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now it works on chrome and firefox.
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Expert Comment

by:Dave Baldwin
ID: 41734492
Interesting.  So how did you rewrite the addUser() function?
0
 
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Accepted Solution

by:
derrida earned 0 total points
ID: 41734535
not a lot to rewrite it:
    let theparams = JSON.stringify({
      name: "Moses",
      address: "dizingoff 29, NY",
      lat: 23.060143,
      lng: 29.770557
    });
    let headers = new Headers();
    headers.append('Content-Type','application/x-www-form-urlencoded;charset=utf-8');

    return this._http.post(
      'http://localhost:80/ang2router/public/addUser2.php',
      theparams,
      {headers: headers}
    )
    .map(res => res.json());

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i'm not sure i can give myself the points :)
0
 
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Expert Comment

by:Dave Baldwin
ID: 41735026
No, but you can give yourself credit.  Although if you feel that I helped you, you can give me some credit.
0
 
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Author Closing Comment

by:derrida
ID: 41743970
icame with the answer
0

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