The 400 Bad Request Error is an HTTP response status code indicating that the server was unable to process the request sent by the client due to invalid syntax. As with the dozens of potential HTTP response codes, receiving a 400 error while accessing your own application can be both frustrating and challenging to fix.
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Note: Lambda functions failing due to a service error, i.e. before the Lambda function code is executed, are not subject to the API Gateway routing mechanism. These types of errors include internal server errors, Lambda function or account throttling, or failure of Lambda to parse the request body. Generally, these types of errors are returned by API Gateway as a 500 response. AWS recommends using CloudWatch Logs to troubleshoot these types of errors.
The get method makes a GET request into the application, while the assertStatus method asserts that the returned response should have the given HTTP status code. In addition to this simple assertion, Laravel also contains a variety of assertions for inspecting the response headers, content, JSON structure, and more.
This document provides details about error cases to be managed by your application, and the error codes and explanations you shall refer to when troubleshooting errors. It also provides details on the request ID sent back to your application for any successful or failed requests to protected resources, and that may be used to report problem to our support team.
Orange APIs use appropriate HTTP response status codes to indicate whether a specific HTTP request has been successfully completed or not. Only two classes of error codes are defined by HTTP/1.1 protocol:
By default, Edge treats HTTP response codes in the 1xx-3xx range as 'success', and HTTP response codes in the range 4xx-5xx as 'failure'. That means any response from the backend service with an HTTP response code 4xx-5xx automatically invokes the error state, which then returns an error message directly to the requesting client.
You can now define custom handlers for HTTP response codes 400 and 500 to return a customized response message to the requesting app. The following TargetEndpoint uses the policy named ReturnError to handle HTTP 400 and 500 response codes:
When browser-based JavaScript code makes a cross-site HTTP request, the browser must sometimes send a "pre-flight" check to make sure the server allows cross-site requests. You can avoid the extra round-trip by ensuring your request meets the CORS definition of a "simple cross-site request".
In the preceding example, all requests starting with /example will be handled by the DispatcherServlet instance named example. In a Servlet 3.0+ environment, you also have the option of configuring the Servlet container programmatically. Below is the code based equivalent of the above web.xml example:
The above example gets the value of the MyRequestHeader request header, and reads the body as a byte array. It adds the MyResponseHeader to the response, writes Hello World to the response stream, and sets the response status code to 201 (Created).
The above filter intercepts HTTP PUT and PATCH requests with content type application/x-www-form-urlencoded, reads the form data from the body of the request, and wraps the ServletRequest in order to make the form data available through the ServletRequest.getParameter*() family of methods.
As HttpPutFormContentFilter consumes the body of the request, it should not be configured for PUT or PATCH URLs that rely on other converters for application/x-www-form-urlencoded. This includes @RequestBody MultiValueMap and HttpEntity.
An @RequestMapping method may wish to support 'Last-Modified' HTTP requests, as defined in the contract for the Servlet API's getLastModified method, to facilitate content caching. This involves calculating a lastModified long value for a given request, comparing it against the 'If-Modified-Since' request header value, and potentially returning a response with status code 304 (Not Modified). An annotated controller method can achieve that as follows:
After the MultipartResolver completes its job, the request is processed like any other. First, create a form with a file input that will allow the user to upload a form. The encoding attribute (enctype="multipart/form-data") lets the browser know how to encode the form as multipart request:
Spring MVC may raise a number of exceptions while processing a request. The SimpleMappingExceptionResolver can easily map any exception to a default error view as needed. However, when working with clients that interpret responses in an automated way you will want to set specific status code on the response. Depending on the exception raised the status code may indicate a client error (4xx) or a server error (5xx).
This option allows static resource requests following a particular URL pattern to be served by a ResourceHttpRequestHandler from any of a list of Resource locations. This provides a convenient way to serve static resources from locations other than the web application root, including locations on the classpath. The cache-period property may be used to set far future expiration headers (1 year is the recommendation of optimization tools such as Page Speed and YSlow) so that they will be more efficiently utilized by the client. The handler also properly evaluates the Last-Modified header (if present) so that a 304 status code will be returned as appropriate, avoiding unnecessary overhead for resources that are already cached by the client. For example, to serve resource requests with a URL pattern of /resources/** from a public-resources directory within the web application root you would use:
For POST methods a request body MUST be included in JSON format in UTF-8. A Content-Type request header MUST be sent with application/json; charset=utf-8 or application/json. A PAIA auth server SHOULD additionally accept URL encoded HTTP POST request bodies with content type application/x-www-form-urlencoded. Request encoding ISO-8859-1 MAY be supported in addition to UTF-8 for these requests.
Malformed requests, failed authentication, unsupported methods, and unexpected server errors such as backend downtime etc. MUST result in an error response. An error response is returned with an HTTP status code 4xx (client error) or 5xx (server error) as defined in RFC 2616, unless the request parameter suppress_response_codes is given.
The iv has a dual use. When the reset code is generated the iv is stored with the user in the database. This is used to enforce single-use of a reset code (it gets cleared when a reset code is processed) as well as prevent use of reset codes generated previously. If the iv in the database does not match the iv used to decrypt the reset code, the request is refused. This may also help with security in the event that the encryption key on the server is somehow compromised, as the attacker has to inject the iv into the database as well to make it work. Of course if the attacker is on the host we are pretty much toast...
Secondly as you probably noticed, to have a replay protection in such a beautiful protocol like http we need to track state (nonces just do not fit in well with single request http commands ;) ) so some database persistence will be needed. And if you already need to persist something I would really consider completely random code and store the code and the generation timestamp in database. 2ff7e9595c
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