Add Flickr upload photo example

examples/Flickr.class.php

@@ -0,0 +1,118 @@
+<?php
+define('FLICKR_API_KEY', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
+define('FLICKR_API_SECRET', 'XXXXXXXXXXXXXXXX');
+
+
+class Flickr
+{
+    public function __construct()
+    {
+        if (session_status() === PHP_SESSION_NONE) {
+            session_start();
+        }
+    }
+
+    public function authenticate()
+    {
+        if (isset($_SESSION['authenticated']) && $_SESSION['authenticated']) {
+            return;
+        }
+
+        if (isset($_GET['oauth_token']) && isset($_GET['oauth_verifier'])) {
+            $this->getAccessToken();
+        } else {
+            $this->getRequestToken();
+        }
+    }
+
+    public function uploadPhoto()
+    {
+        $oauth_data = $this->getOAuthParameters();
+        $oauth_data['oauth_token'] = $_SESSION['oauth_access_token'];
+        $oauth_data['title'] = $_POST['title'];
+        $oauth_data['tags'] = $_POST['tags'];
+
+        $upload_url = 'https://up.flickr.com/services/upload/';
+        $oauth_data['oauth_signature'] = $this->getSignature('POST', $upload_url, $oauth_data);
+        $oauth_data['photo'] = '@' . $_FILES['photo']['tmp_name'];
+
+        $curl = new Curl();
+        $curl->post($upload_url, $oauth_data);
+        return $curl;
+    }
+
+    private function getOAuthParameters()
+    {
+        return array(
+            'oauth_nonce' => md5(microtime() . mt_rand()),
+            'oauth_timestamp' => time(),
+            'oauth_consumer_key' => FLICKR_API_KEY,
+            'oauth_signature_method' => 'HMAC-SHA1',
+            'oauth_version' => '1.0',
+        );
+    }
+
+    private function getSignature($request_method, $url, $parameters)
+    {
+        ksort($parameters, SORT_STRING);
+        $request = implode('&', array(
+            rawurlencode($request_method),
+            rawurlencode($url),
+            rawurlencode(http_build_query($parameters, '', '&', PHP_QUERY_RFC3986)),
+        ));
+        $key = FLICKR_API_SECRET . '&';
+        if (!empty($_SESSION['oauth_access_token_secret'])) {
+            $key .= $_SESSION['oauth_access_token_secret'];
+        } elseif (!empty($_SESSION['oauth_token_secret'])) {
+            $key .= $_SESSION['oauth_token_secret'];
+        }
+        $signature = base64_encode(hash_hmac('sha1', $request, $key, true));
+        return $signature;
+    }
+
+    private function getRequestToken()
+    {
+        $oauth_data = $this->getOAuthParameters();
+        $oauth_data['oauth_callback'] = implode('', array(
+            isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http',
+            '://',
+            $_SERVER['SERVER_NAME'],
+            $_SERVER['SCRIPT_NAME'],
+        ));
+
+        $request_token_url = 'https://www.flickr.com/services/oauth/request_token';
+        $oauth_data['oauth_signature'] = $this->getSignature('POST', $request_token_url, $oauth_data);
+
+        $curl = new Curl();
+        $curl->post($request_token_url, $oauth_data);
+
+        parse_str($curl->response, $parts);
+        $_SESSION['oauth_token_secret'] = $parts['oauth_token_secret'];
+
+        // Continue to Flickr for user's authorization.
+        header('Location: https://secure.flickr.com/services/oauth/authorize?' . http_build_query(array(
+            'oauth_token' => $parts['oauth_token'],
+            'perms' => 'write',
+        )));
+        exit;
+    }
+
+    private function getAccessToken()
+    {
+        $oauth_data = $this->getOAuthParameters();
+        $oauth_data['oauth_token'] = $_GET['oauth_token'];
+        $oauth_data['oauth_verifier'] = $_GET['oauth_verifier'];
+
+        $access_token_url = 'https://www.flickr.com/services/oauth/access_token';
+        $oauth_data['oauth_signature'] = $this->getSignature('POST', $access_token_url, $oauth_data);
+
+        $curl = new Curl();
+        $curl->post($access_token_url, $oauth_data);
+
+        parse_str($curl->response, $parts);
+        $_SESSION['oauth_access_token'] = $parts['oauth_token'];
+        $_SESSION['oauth_access_token_secret'] = $parts['oauth_token_secret'];
+        $_SESSION['user_id'] = $parts['user_nsid'];
+        $_SESSION['authenticated'] = true;
+    }
+}

examples/flickr_upload_photo.php

@@ -0,0 +1,42 @@
+<?php
+require '../src/Curl.class.php';
+require 'Flickr.class.php';
+
+
+$flickr = new Flickr();
+$flickr->authenticate();
+?>
+<!doctype html>
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=utf-8" />
+<title>Flickr Photo Upload</title>
+</head>
+<body>
+
+<?php
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $result = $flickr->uploadPhoto();
+    if ($result->error) {
+        echo '<p>Photo upload failed.</p>';
+    } else {
+        $user_id = $_SESSION['user_id'];
+        $photo_id = $result->response->photoid;
+        $photo_url = 'http://www.flickr.com/photos/' . $user_id . '/' . $photo_id;
+        echo '<p>Photo uploaded successfully. <a href="' . $photo_url . '">View photo</a>.</p>';
+    }
+}
+?>
+
+<form enctype="multipart/form-data" method="post">
+    <fieldset>
+        <legend>Flickr Photo Upload</legend>
+        <label>Photo <input name="photo" type="file" /></label><br />
+        <label>Title <input name="title" placeholder="Vacation (optional)" type="text" /></label><br />
+        <label>Tags <input name="tags" placeholder="tropical,beach,vacation (optional)" type="text" /></label><br />
+        <input type="submit" />
+    </fieldset>
+</form>
+
+</body>
+</html>