public void ScriptInjectionFilterStream_ExceptionOnSubsequentWrite()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
serverSocket.SendString("HTTP/1.1 200 OK\r\n", Encoding.ASCII);
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act I - Write some bytes
filterStream.Write(bytesToSend, 0, 20);
// Assert
Assert.Contains("<html><head></head><", serverSocket.SentContent);
AssertWithMessage.Equal(0, filterContext.GetResponseBody(Encoding.UTF8).Length, "No content should be sent to the response yet.");
Assert.False(serverSocket.IsClosed, "Server connection should not have been closed.");
// Act II - Attempt to write more bytes
serverSocket.ThrowExceptionOnNextSendAsync();
Task result = filterStream.WriteAsync(bytesToSend, 20, bytesToSend.Length - 20);
// Assert
TaskAssert.Faulted(result, "Exception should have been re-thrown");
Assert.Equal("SendAsync after ThrowExceptionOnNextSendAsync was called.", result.Exception.InnerException.Message);
}
public void ScriptInjectionFilterStream_BecomesPassthroughOnTimeout()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act I - Send some bytes
Task writeTask = filterStream.WriteAsync(bytesToSend, 0, 20);
// Assert
TaskAssert.NotCompleted(writeTask, "Should be waiting for server to respond");
// Act II - Wait for the request to time out
System.Threading.Thread.Sleep(1100);
// Assert
TaskAssert.Completed(writeTask, "Write should complete when server fails to respond");
Assert.True(serverSocket.IsClosed, "Should become passthrough");
Assert.Equal("<html><head></head><", filterContext.GetResponseBody(Encoding.UTF8));
AssertWithMessage.Equal(true, filterStream.ScriptInjectionTimedOut, "ScriptInjectionTimedOut");
}
public void ScriptInjectionFilterStream_CompletePassthroughProcess()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext(contentType: "text/css");
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("body { font-size: xxlarge; } p { background-color: red }");
// Act I - Write some bytes
filterStream.Write(bytesToSend, 0, 20);
// Assert
Assert.Equal("body { font-size: xx", filterContext.GetResponseBody(Encoding.UTF8));
Assert.True(serverSocket.IsClosed, "Server connection should be closed.");
// Act II - Write some more bytes
filterStream.Write(bytesToSend, 20, bytesToSend.Length - 20);
// Assert
Assert.Equal("body { font-size: xxlarge; } p { background-color: red }", filterContext.GetResponseBody(Encoding.UTF8));
// Act III - Wait for complete
Task completeTask = filterStream.FlushAsync();
// Assert
TaskAssert.Completed(completeTask, "Flush should complete immediately, because the filter is not being used.");
}
public void ScriptInjectionFilterStream_CompleteFilterProcess()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act I - Write some bytes
Task writeTask = filterStream.WriteAsync(bytesToSend, 0, 20);
// Assert
TaskAssert.NotCompleted(writeTask, "Write task should not complete until a successful response comes from the server.");
// Act Ia - Response from the server
serverSocket.SendString("HTTP/1.1 200 OK\r\n", Encoding.ASCII);
// Assert
TaskAssert.Completed(writeTask, "The write task should complete after we receive the response line from the server.");
Assert.Contains("<html><head></head><", serverSocket.SentContent);
AssertWithMessage.Equal(0, filterContext.GetResponseBody(Encoding.UTF8).Length, "No content should be sent to the response yet.");
Assert.False(serverSocket.IsClosed, "Server connection should not have been closed.");
// Act II - Write some more bytes
filterStream.Write(bytesToSend, 20, bytesToSend.Length - 20);
// Assert
Assert.Contains("body></body></html>", serverSocket.SentContent);
AssertWithMessage.Equal(0, filterContext.GetResponseBody(Encoding.UTF8).Length, "No content should be sent to the response yet.");
Assert.False(serverSocket.IsClosed, "Server connection should not have been closed.");
// Act III - Wait for complete
Task completeTask = filterStream.FlushAsync();
// Assert
TaskAssert.NotCompleted(completeTask, "Before response from server.");
// Act IV - Send response from server
serverSocket.SendString("Content-Length: 17\r\n\r\nXFiltered content", Encoding.ASCII);
// Assert
Assert.Equal("Filtered content", filterContext.GetResponseBody(Encoding.ASCII));
TaskAssert.Completed(completeTask, "After response from server.");
Assert.False(filterStream.ScriptInjectionTimedOut);
}
public void ScriptInjectionFilterStream_PassesCssDirectlyToOutput()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("body { font-weight: bold; }");
// Act
filterStream.Write(bytesToSend, 0, bytesToSend.Length);
// Assert
AssertWithMessage.Equal(0, serverSocket.SentContent.Length, "Non-HTML content shouldn't be sent to the filter.");
Assert.True(serverSocket.IsClosed, "Connection to VS was not closed when non-HTML content was detected.");
Assert.Equal("body { font-weight: bold; }", filterContext.GetResponseBody(Encoding.UTF8));
}
public void ScriptInjectionFilterStream_ExceptionOnFirstWrite()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act - Attempt to write some bytes
serverSocket.ThrowExceptionOnNextSendAsync();
Task writeTask = filterStream.WriteAsync(bytesToSend, 0, 20);
// Assert
TaskAssert.NotFaulted(writeTask, "Task should not be faulted. Filter should switch to passthrough mode.");
Assert.Equal("<html><head></head><", filterContext.GetResponseBody(Encoding.UTF8));
Assert.True(serverSocket.IsClosed, "Server connection should be closed.");
}
public void ScriptInjectionFilterStream_ChecksResponseContentType()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
serverSocket.SendString("HTTP/1.1 200 OK\r\n", Encoding.ASCII);
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext(contentType: "text/javascript");
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("var myhtml = \"<html></html>\";");
// Act
filterStream.Write(bytesToSend, 0, bytesToSend.Length);
// Assert
AssertWithMessage.Equal(0, serverSocket.SentContent.Length, "Non-HTML content shouldn't be sent to the filter.");
Assert.True(serverSocket.IsClosed, "Connection to VS was not closed when non-HTML content was detected.");
Assert.Equal("var myhtml = \"<html></html>\";", filterContext.GetResponseBody(Encoding.UTF8));
}
public void ScriptInjectionFilterStream_PassesHtmlToFilter()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
serverSocket.SendString("HTTP/1.1 200 OK\r\n", Encoding.ASCII);
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act
filterStream.Write(bytesToSend, 0, bytesToSend.Length);
// Assert
Assert.Contains("\r\nContent-Type: text/html\r\n", serverSocket.SentContent);
Assert.Contains("<html><head></head><body></body></html>", serverSocket.SentContent);
AssertWithMessage.Equal(0, filterContext.GetResponseBody(Encoding.UTF8).Length, "No content should be sent to the response yet.");
Assert.False(serverSocket.IsClosed, "Server connection should not have been closed.");
}
public void ScriptInjectionFilterStream_ErrorResponseCodeFromServer()
{
// Arrange
MockSocketAdapter serverSocket = new MockSocketAdapter();
MockScriptInjectionFilterContext filterContext = new MockScriptInjectionFilterContext();
ScriptInjectionFilterStream filterStream = CreateFilterStream(serverSocket, filterContext);
byte[] bytesToSend = Encoding.UTF8.GetBytes("<html><head></head><body></body></html>");
// Act - Attempt to write some bytes
Task writeTask = filterStream.WriteAsync(bytesToSend, 0, 20);
// Assert
TaskAssert.NotCompleted(writeTask, "Task should not complete until the response line is read.");
// Act - Write an error response
serverSocket.SendString("HTTP/1.1 404 Not Found\r\n", Encoding.ASCII);
// Assert
TaskAssert.Completed(writeTask, "Task should complete after the response line is received.");
Assert.Equal("<html><head></head><", filterContext.GetResponseBody(Encoding.UTF8));
Assert.True(serverSocket.IsClosed, "Server connection should be closed.");
}