channels.php

php-4.4.7学习linux时下载的源代码

        }
    }

    function doAdd($command, $options, $params)
    {
        if (sizeof($params) != 1) {
            return $this->raiseError('channel-add: no channel file specified');
        }
        if (strpos($params[0], '://')) {
            $downloader = &$this->getDownloader();
            if (!class_exists('System')) {
                require_once 'System.php';
            }
            $tmpdir = System::mktemp(array('-d'));
            PEAR::staticPushErrorHandling(PEAR_ERROR_RETURN);
            $loc = $downloader->downloadHttp($params[0], $this->ui, $tmpdir, null, false);
            PEAR::staticPopErrorHandling();
            if (PEAR::isError($loc)) {
                return $this->raiseError('channel-add: Cannot open "' . $params[0] . '"');
            } else {
                list($loc, $lastmodified) = $loc;
                $contents = implode('', file($loc));
            }
        } else {
            $lastmodified = false;
            $fp = @fopen($params[0], 'r');
            if (!$fp) {
                return $this->raiseError('channel-add: cannot open "' . $params[0] . '"');
            }
            $contents = '';
            while (!feof($fp)) {
                $contents .= fread($fp, 1024);
            }
            fclose($fp);
        }
        if (!class_exists('PEAR_ChannelFile')) {
            require_once 'PEAR/ChannelFile.php';
        }
        $channel = new PEAR_ChannelFile;
        PEAR::staticPushErrorHandling(PEAR_ERROR_RETURN);
        $result = $channel->fromXmlString($contents);
        PEAR::staticPopErrorHandling();
        if (!$result) {
            $exit = false;
            if (count($errors = $channel->getErrors(true))) {
                foreach ($errors as $error) {
                    $this->ui->outputData(ucfirst($error['level'] . ': ' . $error['message']));
                    if (!$exit) {
                        $exit = $error['level'] == 'error' ? true : false;
                    }
                }
                if ($exit) {
                    return $this->raiseError('channel-add: invalid channel.xml file');
                }
            }
        }
        $reg = &$this->config->getRegistry();
        if ($reg->channelExists($channel->getName())) {
            return $this->raiseError('channel-add: Channel "' . $channel->getName() .
                '" exists, use channel-update to update entry');
        }
        $ret = $reg->addChannel($channel, $lastmodified);
        if (PEAR::isError($ret)) {
            return $ret;
        }
        if (!$ret) {
            return $this->raiseError('channel-add: adding Channel "' . $channel->getName() .
                '" to registry failed');
        }
        $this->config->setChannels($reg->listChannels());
        $this->config->writeConfigFile();
        $this->ui->outputData('Adding Channel "' . $channel->getName() . '" succeeded', $command);
    }

    function doUpdate($command, $options, $params)
    {
        if (!class_exists('System')) {
            require_once 'System.php';
        }
        $tmpdir = System::mktemp(array('-d'));
        $reg = &$this->config->getRegistry();
        if (sizeof($params) != 1) {
            return $this->raiseError("No channel file specified");
        }
        $lastmodified = false;
        if ((!file_exists($params[0]) || is_dir($params[0]))
              && $reg->channelExists(strtolower($params[0]))) {
            $c = $reg->getChannel(strtolower($params[0]));
            $this->ui->outputData('Retrieving channel.xml from remote server');
            $dl = &$this->getDownloader(array());
            // if force is specified, use a timestamp of "1" to force retrieval
            $lastmodified = isset($options['force']) ? false : $c->lastModified();
            PEAR::staticPushErrorHandling(PEAR_ERROR_RETURN);
            $contents = $dl->downloadHttp('http://' . $c->getName() . '/channel.xml',
                $this->ui, $tmpdir, null, $lastmodified);
            PEAR::staticPopErrorHandling();
            if (PEAR::isError($contents)) {
                return $this->raiseError('Cannot retrieve channel.xml for channel "' .
                    $c->getName() . '"');
            }
            list($contents, $lastmodified) = $contents;
            if (!$contents) {
                $this->ui->outputData("Channel $params[0] channel.xml is up to date");
                return;
            }
            $contents = implode('', file($contents));
            if (!class_exists('PEAR_ChannelFile')) {
                require_once 'PEAR/ChannelFile.php';
            }
            $channel = new PEAR_ChannelFile;
            $channel->fromXmlString($contents);
            if (!$channel->getErrors()) {
                // security check: is the downloaded file for the channel we got it from?
                if (strtolower($channel->getName()) != strtolower($c->getName())) {
                    if (isset($options['force'])) {
                        $this->ui->log(0, 'WARNING: downloaded channel definition file' .
                            ' for channel "' . $channel->getName() . '" from channel "' .
                            strtolower($c->getName()) . '"');
                    } else {
                        return $this->raiseError('ERROR: downloaded channel definition file' .
                            ' for channel "' . $channel->getName() . '" from channel "' .
                            strtolower($c->getName()) . '"');
                    }
                }
            }
        } else {
            if (strpos($params[0], '://')) {
                $dl = &$this->getDownloader();
                PEAR::staticPushErrorHandling(PEAR_ERROR_RETURN);
                $loc = $dl->downloadHttp($params[0],
                    $this->ui, $tmpdir, null, $lastmodified);
                PEAR::staticPopErrorHandling();
                if (PEAR::isError($loc)) {
                    return $this->raiseError("Cannot open " . $params[0]);
                } else {
                    list($loc, $lastmodified) = $loc;
                    $contents = implode('', file($loc));
                }
            } else {
                $fp = @fopen($params[0], 'r');
                if (!$fp) {
                    return $this->raiseError("Cannot open " . $params[0]);
                }
                $contents = '';
                while (!feof($fp)) {
                    $contents .= fread($fp, 1024);
                }
                fclose($fp);
            }
            if (!class_exists('PEAR_ChannelFile')) {
                require_once 'PEAR/ChannelFile.php';
            }
            $channel = new PEAR_ChannelFile;
            $channel->fromXmlString($contents);
        }
        $exit = false;
        if (count($errors = $channel->getErrors(true))) {
            foreach ($errors as $error) {
                $this->ui->outputData(ucfirst($error['level'] . ': ' . $error['message']));
                if (!$exit) {
                    $exit = $error['level'] == 'error' ? true : false;
                }
            }
            if ($exit) {
                return $this->raiseError('Invalid channel.xml file');
            }
        }
        if (!$reg->channelExists($channel->getName())) {
            return $this->raiseError('Error: Channel "' . $channel->getName() .
                '" does not exist, use channel-add to add an entry');
        }
        $ret = $reg->updateChannel($channel, $lastmodified);
        if (PEAR::isError($ret)) {
            return $ret;
        }
        if (!$ret) {
            return $this->raiseError('Updating Channel "' . $channel->getName() .
                '" in registry failed');
        }
        $this->config->setChannels($reg->listChannels());
        $this->config->writeConfigFile();
        $this->ui->outputData('Update of Channel "' . $channel->getName() . '" succeeded');
    }

    function &getDownloader()
    {
        if (!class_exists('PEAR_Downloader')) {
            require_once 'PEAR/Downloader.php';
        }
        $a = new PEAR_Downloader($this->ui, array(), $this->config);
        return $a;
    }

    function doAlias($command, $options, $params)
    {
        $reg = &$this->config->getRegistry();
        if (sizeof($params) == 1) {
            return $this->raiseError('No channel alias specified');
        }
        if (sizeof($params) != 2) {
            return $this->raiseError(
                'Invalid format, correct is: channel-alias channel alias');
        }
        if (!$reg->channelExists($params[0], true)) {
            if ($reg->isAlias($params[0])) {
                $extra = ' (use "channel-alias ' . $reg->channelName($params[0]) . ' ' .
                    strtolower($params[1]) . '")';
            } else {
                $extra = '';
            }
            return $this->raiseError('"' . $params[0] . '" is not a valid channel' . $extra);
        }
        if ($reg->isAlias($params[1])) {
            return $this->raiseError('Channel "' . $reg->channelName($params[1]) . '" is ' .
                'already aliased to "' . strtolower($params[1]) . '", cannot re-alias');
        }
        $chan = &$reg->getChannel($params[0]);
        if (!$chan) {
            return $this->raiseError('Corrupt registry?  Error retrieving channel "' . $params[0] .
                '" information');
        }
        // make it a local alias
        if (!$chan->setAlias(strtolower($params[1]), true)) {
            return $this->raiseError('Alias "' . strtolower($params[1]) .
                '" is not a valid channel alias');
        }
        $reg->updateChannel($chan);
        $this->ui->outputData('Channel "' . $chan->getName() . '" aliased successfully to "' .
            strtolower($params[1]) . '"');
    }

    function doDiscover($command, $options, $params)
    {
        $reg = &$this->config->getRegistry();
        if (sizeof($params) != 1) {
            return $this->raiseError("No channel server specified");
        }
        if ($reg->channelExists($params[0])) {
            if ($reg->isAlias($params[0])) {
                return $this->raiseError("A channel alias named \"$params[0]\" " .
                    'already exists, aliasing channel "' . $reg->channelName($params[0])
                    . '"');
            } else {
                return $this->raiseError("Channel \"$params[0]\" is already initialized");
            }
        }
        $this->pushErrorHandling(PEAR_ERROR_RETURN);
        $err = $this->doAdd($command, $options, array('http://' . $params[0] . '/channel.xml'));
        $this->popErrorHandling();
        if (PEAR::isError($err)) {
            return $this->raiseError("Discovery of channel \"$params[0]\" failed");
        }
        $this->ui->outputData("Discovery of channel \"$params[0]\" succeeded", $command);
    }
}
?>