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176 lines
6.2 KiB
ReStructuredText
176 lines
6.2 KiB
ReStructuredText
==========================
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Frequently Asked Questions
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==========================
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Hopefully you can find an answer here to one of your questions. If not, please
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contact `help@twilio.com <mailto:help@twilio.com>`_.
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Debugging Requests
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------------------
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Sometimes the library generates unexpected output. The simplest way to debug is
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to examine the HTTP request that twilio-php actually sent over the wire. You
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can turn on debugging with a simple flag:
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.. code-block:: php
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require('Services/Twilio.php');
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$client = new Services_Twilio('AC123', '456bef');
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$client->http->debug = true;
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Then make requests as you normally would. The URI, method, headers, and body
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of HTTP requests will be logged via the ``error_log`` function.
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require: Failed to open stream messages
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-----------------------------------------
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If you are trying to use the helper library and you get an error message that
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looks like this:
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.. code-block:: php
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PHP Warning: require(Services/Twilio.php): failed to open stream: No such
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file or directory in /path/to/file
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Fatal error: require(): Failed opening required 'Services/Twilio.php'
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(include_path='.:/usr/lib/php:/usr/local/php-5.3.8/lib/php') in
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/Library/Python/2.6/site-packages/phpsh/phpsh.php(578): on line 1
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Your PHP file can't find the Twilio library. The easiest way to do this is to
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move the Services folder from the twilio-php library into the folder containing
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your file. So if you have a file called ``send-sms.php``, your folder structure
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should look like this:
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.. code-block:: bash
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.
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├── send-sms.php
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├── Services
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│ ├── Twilio.php
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│ ├── Twilio
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│ │ ├── ArrayDataProxy.php
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│ │ ├── (..about 50 other files...)
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If you need to copy all of these files to your web hosting server, the easiest
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way is to compress them into a ZIP file, copy that to your server with FTP, and
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then unzip it back into a folder in your CPanel or similar.
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You can also try changing the ``require`` line like this:
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.. code-block:: php
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require('/path/to/twilio-php/Services/Twilio.php');
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You could also try downloading the library via PEAR, a package manager for PHP,
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which will add the library to your PHP path, so you can load the Twilio library
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from anywhere. Run this at the command line:
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.. code-block:: bash
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$ pear channel-discover twilio.github.com/pear
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$ pear install twilio/Services_Twilio
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If you get the following message:
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.. code-block:: bash
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$ -bash: pear: command not found
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you can install PEAR from their website.
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SSL Validation Exceptions
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-------------------------
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If you are using an outdated version of `libcurl`, you may encounter
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SSL validation exceptions. If you see the following error message, you have
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a SSL validation exception: ::
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Fatal error: Uncaught exception 'Services_Twilio_TinyHttpException'
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with message 'SSL certificate problem, verify that the CA cert is OK.
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Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate
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verify failed' in [MY PATH]\Services\Twilio\TinyHttp.php:89
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This means that Twilio is trying to offer a certificate to verify that you are
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actually connecting to `https://api.twilio.com <https://api.twilio.com>`_, but
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your curl client cannot verify our certificate.
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There are four solutions to this problem:
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Upgrade your version of the twilio-php library
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==============================================
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Since November 2011, the SSL certificate has been built in to the helper
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library, and it is used to sign requests made to our API. If you are still
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encountering this problem, you can upgrade your helper library to the latest
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version, and you should not encounter this error anymore.
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If you are using an older version of the helper library, you can try one of the
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following three methods:
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Upgrade your version of libcurl
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===============================
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The Twilio certificate is included in the latest version of the
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``libcurl`` library. Upgrading your system version of ``libcurl`` will
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resolve the SSL error. `Click here to download the latest version of
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libcurl <http://curl.haxx.se/download.html>`_.
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Manually add Twilio's SSL certificate
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=====================================
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The PHP curl library can also manually verify an SSL certificate. In your
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browser, navigate to
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`https://github.com/twilio/twilio-php/blob/master/Services/cacert.pem
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<https://github.com/twilio/twilio-php/blob/master/Services/cacert.pem>`_
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and download the file. (**Note**: If your browser presents ANY warnings
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at this time, your Internet connection may be compromised. Do not download the
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file, and do not proceed with this step). Place this file in the same folder as
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your PHP script. Then, replace this line in your script:
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.. code-block:: php
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$client = new Services_Twilio($sid, $token);
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with this one:
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.. code-block:: php
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$http = new Services_Twilio_TinyHttp(
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'https://api.twilio.com',
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array('curlopts' => array(
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CURLOPT_SSL_VERIFYPEER => true,
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CURLOPT_SSL_VERIFYHOST => 2,
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CURLOPT_CAINFO => getcwd() . "/cacert.pem")));
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$client = new Services_Twilio($sid, $token, "2010-04-01", $http);
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Disable certificate checking
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============================
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A final option is to disable checking the certificate. Disabling the
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certificate check means that a malicious third party can pretend to be
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Twilio, intercept your data, and gain access to your Account SID and
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Auth Token in the process. Because this is a security vulnerability,
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we **strongly discourage** you from disabling certificate checking in
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a production environment. This is known as a `man-in-the-middle attack
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<http://en.wikipedia.org/wiki/Man-in-the-middle_attack>`_.
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If you still want to proceed, here is code that will disable certificate
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checking:
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.. code-block:: php
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$http = new Services_Twilio_TinyHttp(
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'https://api.twilio.com',
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array('curlopts' => array(CURLOPT_SSL_VERIFYPEER => false))
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);
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$client = new Services_Twilio('AC123', 'token', '2010-04-01', $http);
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If this does not work, double check your Account SID, token, and that you do
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not have errors anywhere else in your code. If you need further assistance,
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please email our customer support at `help@twilio.com`_.
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