/Resources/Companion/AdminRole/VMManagerService/PHPRuntimeInstaller.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Net;

using System.Diagnostics;

using System.IO;

using System.ServiceModel.Syndication;

using System.Xml;

using System.Xml.Linq;

using System.Text.RegularExpressions;

using Microsoft.WindowsAzure.ServiceRuntime;



namespace WindowsAzureCompanion.VMManagerService

{

    public class PHPRuntimeInstaller : IInstaller

    {

        private SyndicationItem product = null;

        private string productVersion = null;

        private string downloadFolder = null;

        private string downloadUrl = null;

        private string downloadFileName = null;

        private string installationFolder = null;

        

        public PHPRuntimeInstaller(string installationFolder, string downloadFolder, SyndicationItem product, string productVersion)

        {

            this.product = product;

            this.productVersion = productVersion;

            this.downloadFolder = downloadFolder;

            this.downloadUrl = WindowsAzureVMManager.GetDownloadUrlFromProductVersion(product, productVersion);

            this.downloadFileName = WindowsAzureVMManager.GetAttributeValueFromProductVersion(product, productVersion, "downloadFileName");

            this.installationFolder = installationFolder;

        }



        // Install PHP Runtime

        public void Install()

        {

            try

            {

                WindowsAzureVMManager.DownloadAndExtractWebArchive(downloadUrl, downloadFileName, downloadFolder, installationFolder, null);

                // Configure PHP runtime

                ConfigurePHPRuntime();

                Trace.TraceInformation("Successfully installed {0}", product.Title.Text);

            }

            catch (Exception ex)

            {

                Trace.TraceError("Unable to install PHP Runtime: {0}", downloadUrl);

                throw ex;

            }

        }



        // Configure PHP runtime

        private void ConfigurePHPRuntime()

        {

            // Create php.ini from standard template file provided in runtime

            string phpIniFileName = Path.Combine(installationFolder, "php.ini");

            if (File.Exists(Path.Combine(installationFolder, "php.ini-recommended")))

            {

                File.Copy(Path.Combine(installationFolder, @"php.ini-recommended"), phpIniFileName);

            }

            else if (File.Exists(Path.Combine(installationFolder , @"php.ini-production")))

            {

                File.Copy(Path.Combine(installationFolder, @"php.ini-production"), phpIniFileName);

            }

            else if (File.Exists(Path.Combine(installationFolder , @"php.ini-development")))

            {

                File.Copy(Path.Combine(installationFolder, @"php.ini-development"), phpIniFileName);

            }

            else

            {

                Trace.TraceError("php.ini template not found. Unable to install PHP Runtime.");

                return;

            }



            // Set extension dir

            string extensionDir = Path.Combine(installationFolder, WindowsAzureVMManager.ExtensionsFolderForPHP);

            FileUtils.AppendToFile(phpIniFileName, "extension_dir = \"" + extensionDir + "\"");



            // Set log folder and file name

            string logFolderName = Path.Combine(installationFolder, "logs");

            Directory.CreateDirectory(logFolderName);

            string logFileName = Path.Combine(logFolderName, "log.txt");



            // Set library/framwwork directory

            string includePath = Path.Combine(installationFolder, WindowsAzureVMManager.LibraryFolderForPHP);



            // Set session path dir

            string tmpPath = Directory.CreateDirectory(Path.Combine(installationFolder, "tmp")).FullName;

            FileUtils.AppendToFile(phpIniFileName, "session.save_path = \"" + tmpPath + "\"");



            // Add and enable extensions

            // Update php.ini and enabled all extension dll specified

            XElement downloadUrlsElement = product.ElementExtensions.Where<SyndicationElementExtension>

                (x => x.OuterName == "installerFileChoices").FirstOrDefault().GetObject<XElement>();



            // TODO: Use Linq Query instead of foreach loop

            foreach (XElement extension in downloadUrlsElement.Elements())

            {

                if (extension.Attribute("version").Value.Equals(productVersion))

                {

                    // Iterate through properties

                    foreach (XElement propertyExtension in extension.Elements().First().Elements())

                    {

                        if (propertyExtension.Attribute("name").Value.Equals("extensions"))

                        {

                            string dllNames = propertyExtension.Attribute("value").Value;



                            // Add each extension to php.ini

                            foreach (string dllName in dllNames.Split(','))

                            {

                                // Enable extension only if dll is available

                                if (File.Exists(Path.Combine(extensionDir, dllName)))

                                {

                                    FileUtils.AppendToFile(phpIniFileName, "extension = " + dllName);

                                    Trace.TraceInformation("Enabled PHP extension {0}", dllName);

                                }

                                else

                                {

                                    Trace.TraceWarning("Ignored PHP extension as {0} is not available.", dllName);

                                }

                            }

                            break;

                        }

                    }

                }

            }                       



            // Set time zone

            FileUtils.AppendToFile(phpIniFileName, "date.timezone = UTC");

            FileUtils.AppendToFile(phpIniFileName, "max_execution_time = 900");

            FileUtils.AppendToFile(phpIniFileName, "max_input_time = 900");

            FileUtils.AppendToFile(phpIniFileName, "mysql.connect_timeout = 600");

            FileUtils.AppendToFile(phpIniFileName, "display_errors = On");

            FileUtils.AppendToFile(phpIniFileName, "display_startup_errors = On");

            FileUtils.AppendToFile(phpIniFileName, "post_max_size = 200M");

            FileUtils.AppendToFile(phpIniFileName, "upload_max_filesize = 200M");

            FileUtils.AppendToFile(phpIniFileName, "default_socket_timeout = 600");

            FileUtils.AppendToFile(phpIniFileName, "error_log = \"" + logFileName + "\"");

            FileUtils.AppendToFile(phpIniFileName, "error_reporting = E_ALL");

            FileUtils.AppendToFile(phpIniFileName, "cgi.force_redirect = 0");

            FileUtils.AppendToFile(phpIniFileName, "cgi.fix_pathinfo = 1");

            FileUtils.AppendToFile(phpIniFileName, "fastcgi.impersonate = 1");

            FileUtils.AppendToFile(phpIniFileName, "fastcgi.logging = 0");

            FileUtils.AppendToFile(phpIniFileName, "include_path = \".;" + includePath + "\"");

            FileUtils.AppendToFile(phpIniFileName, "variables_order=EGPCS");      

        }



        // Re-configure PHP runtime

        public static void ReConfigurePHPRuntime(string installationFolder)

        {

            // Do not reconfigure in devfabric as we do not have xdrive path in php.ini

            if (RoleEnvironment.DeploymentId.StartsWith("deployment"))

            {

                return;

            }



            if (!Directory.Exists(installationFolder))

            {

                throw new System.ArgumentException(

                        String.Format("Directory does not exist: {0}", installationFolder),

                        "installationFolder"

                        );

            }



            StreamReader streamReader = null;

            StreamWriter streamWriter = null;



            // Read file content

            string phpIniFileName = Path.Combine(installationFolder, "php.ini");



            if (!File.Exists(phpIniFileName))

            {

                throw new System.InvalidOperationException(

                        String.Format("File 'php.ini' does not exist within this Directory: {0}", installationFolder)

                        );

            }

            streamReader = File.OpenText(phpIniFileName);

            string contents = streamReader.ReadToEnd();

            streamReader.Close();



            // Replace old XDrive letter with new XDrive letter

            string letter = Path.GetPathRoot(installationFolder).Substring(0, 1);

            contents = Regex.Replace(contents, "\"[a-zA-Z]:\\\\", "\"" + letter + @":\");

            contents = Regex.Replace(contents, "\"[a-zA-Z]:/", "\"" + letter + ":/");

            File.Delete(phpIniFileName);

            streamWriter = File.CreateText(phpIniFileName);

            streamWriter.Write(contents);

            streamWriter.Close();

        }

    }

}