577 lines
16 KiB
PHP
577 lines
16 KiB
PHP
<?php
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/**
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*
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* Module: dfrn_request
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*
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* Purpose: Handles communication associated with the issuance of
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* friend requests.
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*
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*/
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if(! function_exists('dfrn_request_init')) {
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function dfrn_request_init(&$a) {
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if($a->argc > 1)
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$which = $a->argv[1];
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profile_load($a,$which);
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return;
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}}
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/**
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* Function: dfrn_request_post
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*
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* Purpose:
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* Handles multiple scenarios.
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*
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* Scenario 1:
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* Clicking 'submit' on a friend request page.
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*
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* Scenario 2:
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* Following Scenario 1, we are brought back to our home site
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* in order to link our friend request with our own server cell.
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* After logging in, we click 'submit' to approve the linkage.
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*
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*/
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if(! function_exists('dfrn_request_post')) {
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function dfrn_request_post(&$a) {
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if(($a->argc != 2) || (! count($a->profile)))
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return;
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if($_POST['cancel']) {
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goaway($a->get_baseurl());
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}
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/**
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*
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* Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
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* to confirm the request, and then we've clicked submit (perhaps after logging in).
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* That brings us here:
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*
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*/
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if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
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/**
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* Ensure this is a valid request
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*/
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if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
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$dfrn_url = notags(trim($_POST['dfrn_url']));
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$aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
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$confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
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$contact_record = null;
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if(x($dfrn_url)) {
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/**
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* Lookup the contact based on their URL (which is the only unique thing we have at the moment)
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*/
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$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
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intval(local_user()),
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dbesc($dfrn_url)
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);
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if(count($r)) {
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if(strlen($r[0]['dfrn-id'])) {
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/**
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* We don't need to be here. It has already happened.
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*/
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notice( t("This introduction has already been accepted.") . EOL );
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return;
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}
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else
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$contact_record = $r[0];
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}
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if(is_array($contact_record)) {
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$r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
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intval($aes_allow),
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intval($contact_record['id'])
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);
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}
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else {
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/**
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* Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
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*/
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require_once('Scrape.php');
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$parms = scrape_dfrn($dfrn_url);
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if(! count($parms)) {
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notice( t('Profile location is not valid or does not contain profile information.') . EOL );
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return;
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}
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else {
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if(! x($parms,'fn'))
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notice( t('Warning: profile location has no identifiable owner name.') . EOL );
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if(! x($parms,'photo'))
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notice( t('Warning: profile location has no profile photo.') . EOL );
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$invalid = validate_dfrn($parms);
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if($invalid) {
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notice( $invalid . t(' required parameter')
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. (($invalid == 1) ? t(" was ") : t("s were ") )
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. t("not found at the given location.") . EOL ) ;
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return;
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}
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}
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$dfrn_request = $parms['dfrn-request'];
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/********* Escape the entire array ********/
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dbesc_array($parms);
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/******************************************/
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/**
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* Create a contact record on our site for the other person
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*/
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$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `nick`, `photo`, `site-pubkey`,
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`request`, `confirm`, `notify`, `poll`, `aes_allow`)
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VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)",
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intval(local_user()),
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datetime_convert(),
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dbesc($dfrn_url),
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$parms['fn'],
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$parms['nick'],
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$parms['photo'],
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$parms['key'],
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$parms['dfrn-request'],
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$parms['dfrn-confirm'],
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$parms['dfrn-notify'],
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$parms['dfrn-poll'],
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intval($aes_allow)
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);
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}
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if($r) {
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notice( t("Introduction complete.") . EOL);
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}
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/**
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* Allow the blocked remote notification to complete
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*/
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if(is_array($contact_record))
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$dfrn_request = $contact_record['request'];
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if(strlen($dfrn_request) && strlen($confirm_key))
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$s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
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// (ignore reply, nothing we can do it failed)
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goaway($dfrn_url);
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return; // NOTREACHED
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}
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}
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// invalid/bogus request
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notice( t('Unrecoverable protocol error.') . EOL );
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goaway($a->get_baseurl());
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return; // NOTREACHED
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}
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/**
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* Otherwise:
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*
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* Scenario 1:
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* We are the requestee. A person from a remote cell has made an introduction
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* on our profile web page and clicked submit. We will use their DFRN-URL to
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* figure out how to contact their cell.
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*
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* Scrape the originating DFRN-URL for everything we need. Create a contact record
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* and an introduction to show our user next time he/she logs in.
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* Finally redirect back to the requestor so that their site can record the request.
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* If our user (the requestee) later confirms this request, a record of it will need
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* to exist on the requestor's cell in order for the confirmation process to complete..
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*
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* It's possible that neither the requestor or the requestee are logged in at the moment,
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* and the requestor does not yet have any credentials to the requestee profile.
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*
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* Who is the requestee? We've already loaded their profile which means their nickname should be
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* in $a->argv[1] and we should have their complete info in $a->profile.
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*
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*/
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if(! (is_array($a->profile) && count($a->profile))) {
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notice( t('Profile unavailable.') . EOL);
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return;
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}
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$nickname = $a->profile['nickname'];
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$notify_flags = $a->profile['notify-flags'];
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$uid = $a->profile['uid'];
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$maxreq = intval($a->profile['maxreq']);
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$contact_record = null;
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$failed = false;
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$parms = null;
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if( x($_POST,'dfrn_url')) {
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/**
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* Block friend request spam
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*/
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if($maxreq) {
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$r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
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dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
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intval($uid)
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);
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if(count($r) > $maxreq) {
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notice( $a->profile['name'] . t(' has received too many connection requests today.') . EOL);
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notice( t('Spam protection measures have been invoked.') . EOL);
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notice( t('Friends are advised to please try again in 24 hours.') . EOL);
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return;
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}
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}
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$url = trim($_POST['dfrn_url']);
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if(! strlen($url)) {
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notice( t("Invalid locator") . EOL );
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return;
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}
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// Canonicalise email-style profile locator
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$url = webfinger_dfrn($url);
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if(substr($url,0,5) === 'stat:') {
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$network = 'stat';
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$url = substr($url,5);
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}
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else {
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$network = 'dfrn';
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}
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logger('dfrn_request: url: ' . $url);
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if(! strlen($url)) {
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notice( t("Unable to resolve your name at the provided location.") . EOL);
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return;
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}
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if($network === 'dfrn') {
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$ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
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intval($uid),
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dbesc($url)
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);
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if(count($ret)) {
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if(strlen($ret[0]['issued-id'])) {
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notice( t('You have already introduced yourself here.') . EOL );
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return;
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}
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elseif($ret[0]['rel'] == REL_BUD) {
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notice( t('Apparently you are already friends with .') . $a->profile['name'] . EOL);
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return;
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}
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else {
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$contact_record = $ret[0];
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$parms = array('dfrn-request' => $ret[0]['request']);
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}
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}
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$issued_id = random_string();
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if(is_array($contact_record)) {
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// There is a contact record but no issued-id, so this
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// is a reciprocal introduction from a known contact
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$r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
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dbesc($issued_id),
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intval($contact_record['id'])
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);
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}
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else {
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if(! validate_url($url)) {
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notice( t('Invalid profile URL.') . EOL);
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goaway($a->get_baseurl() . '/' . $a->cmd);
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return; // NOTREACHED
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}
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if(! allowed_url($url)) {
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notice( t('Disallowed profile URL.') . EOL);
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goaway($a->get_baseurl() . '/' . $a->cmd);
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return; // NOTREACHED
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}
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require_once('Scrape.php');
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$parms = scrape_dfrn($url);
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if(! count($parms)) {
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notice( t('Profile location is not valid or does not contain profile information.') . EOL );
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goaway($a->get_baseurl() . '/' . $a->cmd);
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}
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else {
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if(! x($parms,'fn'))
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notice( t('Warning: profile location has no identifiable owner name.') . EOL );
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if(! x($parms,'photo'))
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notice( t('Warning: profile location has no profile photo.') . EOL );
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$invalid = validate_dfrn($parms);
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if($invalid) {
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notice( $invalid . t(' required parameter')
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. (($invalid == 1) ? t(" was ") : t("s were ") )
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. t("not found at the given location.") . EOL ) ;
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return;
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}
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}
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$parms['url'] = $url;
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$parms['issued-id'] = $issued_id;
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dbesc_array($parms);
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$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
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`request`, `confirm`, `notify`, `poll` )
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VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
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intval($uid),
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datetime_convert(),
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$parms['url'],
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$parms['fn'],
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$parms['nick'],
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$parms['issued-id'],
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$parms['photo'],
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$parms['key'],
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$parms['dfrn-request'],
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$parms['dfrn-confirm'],
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$parms['dfrn-notify'],
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$parms['dfrn-poll']
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);
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// find the contact record we just created
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if($r) {
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$r = q("SELECT `id` FROM `contact`
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WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
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intval($uid),
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$parms['url'],
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$parms['issued-id']
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);
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if(count($r))
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$contact_record = $r[0];
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}
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}
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if($r === false) {
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notice( t('Failed to update contact record.') . EOL );
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return;
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}
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$hash = random_string() . (string) time(); // Generate a confirm_key
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if(is_array($contact_record)) {
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$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
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VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
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intval($uid),
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intval($contact_record['id']),
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((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
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dbesc(notags(trim($_POST['dfrn-request-message']))),
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dbesc($hash),
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dbesc(datetime_convert())
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);
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}
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// This notice will only be seen by the requestor if the requestor and requestee are on the same server.
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if(! $failed)
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notice( t('Your introduction has been sent.') . EOL );
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// "Homecoming" - send the requestor back to their site to record the introduction.
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$dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
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$aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
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goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
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. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
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. '&confirm_key=' . $hash
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. (($aes_allow) ? "&aes_allow=1" : "")
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);
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// NOTREACHED
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// END $network === 'dfrn'
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}
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elseif($network === 'stat') {
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/**
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*
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* OStatus network
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* Check contact existence
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* Try and scrape together enough information to create a contact record, with us as REL_VIP
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* Substitute our user's feed URL into $url template
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* Send the subscriber home to subscribe
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*
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*/
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$url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
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goaway($url);
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// NOTREACHED
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// END $network === 'stat'
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}
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} return;
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}}
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if(! function_exists('dfrn_request_content')) {
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function dfrn_request_content(&$a) {
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if(($a->argc != 2) || (! count($a->profile)))
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return "";
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$a->page['template'] = 'profile';
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// "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
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// to send us to the post section to record the introduction.
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if(x($_GET,'dfrn_url')) {
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if(! local_user()) {
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notice( t("Please login to confirm introduction.") . EOL );
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return login();
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}
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// Edge case, but can easily happen in the wild. This person is authenticated,
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// but not as the person who needs to deal with this request.
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if ($a->user['nickname'] != $a->argv[1]) {
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notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
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return login();
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}
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$dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
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$aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
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$confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
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$o .= load_view_file("view/dfrn_req_confirm.tpl");
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$o = replace_macros($o,array(
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'$dfrn_url' => $dfrn_url,
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'$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
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'$confirm_key' => $confirm_key,
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'$username' => $a->user['username'],
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'$uid' => $_SESSION['uid'],
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'$nickname' => $a->user['nickname'],
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'dfrn_rawurl' => $_GET['dfrn_url']
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));
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return $o;
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}
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elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
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// we are the requestee and it is now safe to send our user their introduction,
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// We could just unblock it, but first we have to jump through a few hoops to
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// send an email, or even to find out if we need to send an email.
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$intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
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dbesc($_GET['confirm_key'])
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);
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if(count($intro)) {
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$r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
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WHERE `contact`.`id` = %d LIMIT 1",
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intval($intro[0]['contact-id'])
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);
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$auto_confirm = false;
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if(count($r)) {
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if($r[0]['page-flags'] != PAGE_NORMAL)
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$auto_confirm = true;
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if(($r[0]['notify-flags'] & NOTIFY_INTRO) && (! $auto_confirm)) {
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$email_tpl = load_view_file('view/request_notify_eml.tpl');
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$email = replace_macros($email_tpl, array(
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'$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
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'$url' => stripslashes($r[0]['url']),
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'$myname' => $r[0]['username'],
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'$siteurl' => $a->get_baseurl(),
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'$sitename' => $a->config['sitename']
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));
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$res = mail($r[0]['email'],
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t("Introduction received at ") . $a->config['sitename'],
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$email,
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'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] );
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// This is a redundant notification - no point throwing errors if it fails.
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}
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if($auto_confirm) {
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require_once('mod/dfrn_confirm.php');
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$handsfree = array(
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'uid' => $r[0]['uid'],
|
|
'node' => $r[0]['nickname'],
|
|
'dfrn_id' => $r[0]['issued-id'],
|
|
'intro_id' => $intro[0]['id'],
|
|
'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0)
|
|
);
|
|
dfrn_confirm_post($a,$handsfree);
|
|
}
|
|
|
|
}
|
|
|
|
if(! $auto_confirm) {
|
|
|
|
// If we are auto_confirming, this record will have already been nuked
|
|
// in dfrn_confirm_post()
|
|
|
|
$r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
|
|
dbesc($_GET['confirm_key'])
|
|
);
|
|
}
|
|
}
|
|
killme();
|
|
return; // NOTREACHED
|
|
}
|
|
else {
|
|
$myaddr = ((x($_GET,'address')) ? urldecode($_GET['address']) : '');
|
|
// Normal web request. Display our user's introduction form.
|
|
if($a->profile['page-flags'] == PAGE_NORMAL)
|
|
$tpl = load_view_file('view/dfrn_request.tpl');
|
|
else
|
|
$tpl = load_view_file('view/auto_request.tpl');
|
|
$o .= replace_macros($tpl,array(
|
|
'$header' => t('Friend/Connection Request'),
|
|
'$pls_answer' => t('Please answer the following:'),
|
|
'$does_know' => t('Does $name know you?'),
|
|
'$yes' => t('Yes'),
|
|
'$no' => t('No'),
|
|
'$add_note' => t('Add a personal note:'),
|
|
'$page_desc' => t('Please enter your profile address from one of the following supported social networks:'),
|
|
'$friendika' => t('Friendika'),
|
|
'$statusnet' => t('StatusNet/Federated Social Web'),
|
|
'$private_net' => t("Private \x28secure\x29 network"),
|
|
'$public_net' => t("Public \x28insecure\x29 network"),
|
|
'$your_address' => t('Your profile address:'),
|
|
'$submit' => t('Submit Request'),
|
|
'$cancel' => t('Cancel'),
|
|
'$nickname' => $a->argv[1],
|
|
'$name' => $a->profile['name'],
|
|
'$myaddr' => $myaddr
|
|
));
|
|
return $o;
|
|
}
|
|
|
|
return; // Somebody is fishing.
|
|
}} |