Fixing instance thread safety

Former-commit-id: 2121efd8578141a0edc316c471a7fc3a7834fc53

src/ImageProcessor.Web/NET45/HttpModules/ImageProcessingModule.cs

@@ -412,8 +412,7 @@ namespace ImageProcessor.Web.HttpModules
 
                                                     // Process the Image
                                                     imageFactory.Load(memoryStream)
-                                                                .AddQueryString(queryString)
-                                                                .AutoProcess()
+                                                                .AutoProcess(queryString)
                                                                 .Save(cachedPath);
 
                                                     // Store the response type in the context for later retrieval.
@@ -451,7 +450,9 @@ namespace ImageProcessor.Web.HttpModules
                                     semaphore.Wait();
 
                                     // Process the Image
-                                    imageFactory.Load(fullPath).AutoProcess().Save(cachedPath);
+                                    imageFactory.Load(requestPath)
+                                                .AutoProcess(queryString)
+                                                .Save(cachedPath);
 
                                     // Store the response type in the context for later retrieval.
                                     context.Items[CachedResponseTypeKey] = imageFactory.CurrentImageFormat.MimeType;

src/ImageProcessor.Web/NET45/ImageFactoryExtensions.cs

@@ -34,10 +34,11 @@ namespace ImageProcessor.Web
         /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class
         /// that this method extends.
         /// </param>
+        /// <param name="queryString">The collection of querystring parameters to process.</param>
         /// <returns>
         /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
         /// </returns>
-        public static ImageFactory AutoProcess(this ImageFactory factory)
+        public static ImageFactory AutoProcess(this ImageFactory factory, string queryString)
         {
             if (factory.ShouldProcess)
             {
@@ -47,7 +48,7 @@ namespace ImageProcessor.Web
                     // Get a list of all graphics processors that have parsed and matched the query string.
                     List<IWebGraphicsProcessor> graphicsProcessors =
                         ImageProcessorConfiguration.Instance.GraphicsProcessors
-                        .Where(x => x.MatchRegexIndex(factory.QueryString) != int.MaxValue)
+                        .Where(x => x.MatchRegexIndex(queryString) != int.MaxValue)
                         .OrderBy(y => y.SortOrder)
                         .ToList();
 

src/ImageProcessor.Web/NET45/Processors/Format.cs

@@ -134,24 +134,30 @@ namespace ImageProcessor.Web.Processors
         {
             identifier = identifier.ToLowerInvariant();
             string finalIdentifier = identifier.Equals("png8") ? "png" : identifier;
+            ISupportedImageFormat newFormat = null;
             ISupportedImageFormat format = ImageProcessorBootstrapper.Instance.SupportedImageFormats
                                            .FirstOrDefault(f => f.FileExtensions.Any(e => e.Equals(finalIdentifier, StringComparison.InvariantCultureIgnoreCase)));
 
             if (format != null)
             {
-                // I wish this wasn't hard-coded but there's no way I can
-                // find to preserve the palette.
-                if (identifier.Equals("png8"))
+                // Return a new instance as we want to use instance properties.
+                newFormat = Activator.CreateInstance(format.GetType()) as ISupportedImageFormat;
+                if (newFormat != null)
                 {
-                    format.IsIndexed = true;
-                }
-                else if (identifier.Equals("png"))
-                {
-                    format.IsIndexed = false;
+                    // I wish this wasn't hard-coded but there's no way I can
+                    // find to preserve the palette.
+                    if (identifier.Equals("png8"))
+                    {
+                        newFormat.IsIndexed = true;
+                    }
+                    else if (identifier.Equals("png"))
+                    {
+                        newFormat.IsIndexed = false;
+                    }
                 }
             }
 
-            return format;
+            return newFormat;
         }
     }
 }

src/ImageProcessor/Core/Common/Exceptions/ImageFormatException.cs

@@ -11,6 +11,7 @@
 namespace ImageProcessor.Core.Common.Exceptions
 {
     using System;
+    using System.Runtime.Serialization;
 
     /// <summary>
     /// The exception that is thrown when loading the supported image format types has failed.

src/ImageProcessor/ImageFactory.cs

@@ -94,11 +94,6 @@ namespace ImageProcessor
         /// </summary>
         public string ImagePath { get; private set; }
 
-        /// <summary>
-        /// Gets the query-string parameters for web image manipulation.
-        /// </summary>
-        public string QueryString { get; private set; }
-
         /// <summary>
         /// Gets a value indicating whether the image factory should process the file.
         /// </summary>
@@ -182,23 +177,13 @@ namespace ImageProcessor
         /// </returns>
         public ImageFactory Load(string imagePath)
         {
-            // Remove any querystring parameters passed by web requests.
-            string[] paths = imagePath.Split('?');
-            string path = paths[0];
-            string query = string.Empty;
-
-            if (paths.Length > 1)
+            FileInfo fileInfo = new FileInfo(imagePath);
+            if (fileInfo.Exists)
             {
-                query = paths[1];
-            }
-
-            if (File.Exists(path))
-            {
-                this.ImagePath = path;
-                this.QueryString = query;
+                this.ImagePath = imagePath;
 
                 // Open a file stream to prevent the need for lock.
-                using (FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read))
+                using (FileStream fileStream = new FileStream(imagePath, FileMode.Open, FileAccess.Read))
                 {
                     ISupportedImageFormat format = FormatUtilities.GetFormat(fileStream);
 
@@ -237,6 +222,10 @@ namespace ImageProcessor
                     this.ShouldProcess = true;
                 }
             }
+            else
+            {
+                throw new FileNotFoundException(imagePath);
+            }
 
             return this;
         }
@@ -267,24 +256,6 @@ namespace ImageProcessor
         }
 
         #region Manipulation
-        /// <summary>
-        /// Adds a query-string to the image factory to allow auto-processing of remote files.
-        /// </summary>
-        /// <param name="query">The query-string parameter to process.</param>
-        /// <returns>
-        /// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
-        /// </returns>
-        public ImageFactory AddQueryString(string query)
-        {
-            // TODO: Remove this.
-            if (this.ShouldProcess)
-            {
-                this.QueryString = query;
-            }
-
-            return this;
-        }
-
         /// <summary>
         /// Changes the opacity of the current image.
         /// </summary>

src/ImageProcessor/Imaging/Formats/FormatUtilities.cs

@@ -10,6 +10,7 @@
 
 namespace ImageProcessor.Imaging.Formats
 {
+    using System;
     using System.Collections.Generic;
     using System.Drawing;
     using System.Drawing.Imaging;
@@ -53,7 +54,9 @@ namespace ImageProcessor.Imaging.Formats
                     if (header.SequenceEqual(buffer.Take(header.Length)))
                     {
                         stream.Position = 0;
-                        return supportedImageFormat;
+
+                        // Return a new instance as we want to use instance properties.
+                        return Activator.CreateInstance(supportedImageFormat.GetType()) as ISupportedImageFormat;
                     }
                 }
             }

src/ImageProcessor/Imaging/Formats/JpegFormat.cs

@@ -22,6 +22,14 @@ namespace ImageProcessor.Imaging.Formats
     /// </summary>
     public sealed class JpegFormat : FormatBase
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JpegFormat"/> class.
+        /// </summary>
+        public JpegFormat()
+        {
+            this.Quality = 90;
+        }
+
         /// <summary>
         /// Gets the file headers.
         /// </summary>

src/ImageProcessor/Processors/Format.cs

@@ -13,11 +13,7 @@ namespace ImageProcessor.Processors
     #region Using
     using System.Collections.Generic;
     using System.Drawing;
-    using System.Drawing.Imaging;
-    using System.Text.RegularExpressions;
-
     using ImageProcessor.Imaging.Formats;
-
     #endregion
 
     /// <summary>