I have an API gateway which is a kind of url shortner, it accepts all
the get requests and return the long url associated with that short
url path. example
input GET => xxx.com/abc
return => aaa.com/blablablabla
I want to implement some validation on this so that I don't get
unnecessary junk requests based on path with a regular expression
suppose path should start with "a" in incoming request xxx.com/abc
How can I do that via api gateway request validator, any help
You better try Lambda Authorizer for requests validator.
Your Lambda function will have 2 main tasks
Validate the URL of the request.
Validate the request's Auth header.
Lambda supports various of languages: Python3, Go, Java, Node.js ... so you are freely to use ReGex to filter your requests.
Reference: https://docs.aws.amazon.com/apigateway/latest/developerguide/configure-api-gateway-lambda-authorization-with-console.html
Related
i have api gateway with 3 simple backends:
2 basic api routes (/plus and /minus) backed by lambda functions
1 direct sqs queue (/sqs_send)
It means i can send via api call directly to my sqs queue.
2 lambda backend functions take 2 params 'a,b' from api call and add,subtract and show output.
https://86bwtlv5ya.execute-api.us-east-1.amazonaws.com/minus?a=10&b=20 # prints -10 in browser
https://86bwtlv5ya.execute-api.us-east-1.amazonaws.com/plus?a=10&b=20 # prints 30 in browser
The 3rd function is tricky for me. Via postman i managed to send directly to sqs like this via put request. Notice how i have to select "body" "raw" then input message. I did check the sqs queue - the msg from postman is there.
My question - what to type into my api gateway endpoint to send msg directly to sqs? Without using postman?
https://86bwtlv5ya.execute-api.us-east-1.amazonaws.com/sqs_send?mesagebody # what to type after sqs_send?
This did not work - returns {"message":"Not Found"}
https://86bwtlv5ya.execute-api.us-east-1.amazonaws.com/sqs_send?
Action=SendMessage&
MessageBody=This+is+a+test+message
Is it possible, my sqs_send api route does not work with parameters, because it is designed to only work with "messagebody" as per my settings? "Message attributes" is empty?
If I understood correctly, you want to call your API gateway endpoints by directly entering the URL into your browser's address bar.
Short answer:
Unfortunately you can't do this with your 3rd endpoint /sqs_send, because it is a PUT endpoint which the browser cannot call directly through the address bar.
Details:
Browsers usually support only HTTP GET and POST methods directly, through form submissions (which in turn is an HTML limitation, where form submissions only support these two methods). In GET method, parameters are appended to the end of the URL in the pattern example.com/?name1=value1&name2=value2. In POST method, parameters are included in the body of the request, so they're not visible in the URL itself. This means that you can only call GET endpoints by directly typing into the address bar of your browser. Your /plus and /minus are likely GET endpoints. POST endpoints must be called via HTML form submissions to include your parameters.
For calling other methods like PUT and DELETE (in addition to GET and POST), you will have to use XMLHttpRequest or the Fetch API, or some frontend framework method built around them. As your Postman screenshot shows, your third endpoint /sqs_send is a PUT, so you can't call it directly by entering the URL into the browser's address bar. If you must call it this way, you will have to convert your endpoint to a GET so that you can send your parameters via URL parameters.
My API is a request that can potentially have spaces in the pathParameters.
/data/{id}/hello/{Some message with a space}.
A sample request would be /data/23/hello/Say%20Hi
My angular code from the frontend encodes the request URL that is sent out to the AWS API Gateway but I get the following error.
`The Canonical String for this request should have been
'GET
/data/23/hello/Sayr%2520Hi`
My API gateway has a velocity template the decodes the parameters using $util.urlDecode()
I'm facing the same problem.
I've been stuck for a day.
If you are using HttpApi it cannot be solved.
Nevertheless, if you use RestApi I managed to make this work.
Specifically, you should use the URL Path Parameters.
You should:
Add a resource containing the /{variable}
Add a Url Path Parameter in the Integration Request Configuration with name variable and mapped from method.request.path.variable
Notice that the solution may depend on the integration type that you are using.
In the screenshot below you can see how I'm redirecting all the received traffic to a NetworkLoadBalancer.
The resource has the variable /{proxy+}, the endpoint URL has the {proxy}, and, in the URL Path Parameters, I've configured the mapping method.request.path.proxy.
Numerous services can accept query string parameters in the URL when a POST request is made with Content-Type: application/x-www-form-urlencoded and other parameters in the body, but it seems AWS API Gateway cannot while also accepting query string parameters.
When I call the AWS API Gateway with a POST Mapping Template for application/x-www-form-urlencoded and query string URL parameters (with a Lambda function), I get the following error:
{
"message":"When Content-Type:application/x-www-form-urlencoded,
URL cannot include query-string parameters (after '?'):
'/prod/webhook?inputType=wootric&outputType=glip&url=...'"
}
Here is an example cURL:
curl -XPOST 'https://{myid}.execute-api.{myregion}.amazonaws.com/prod/webhook? \
inputType=wootric&outputType=glip&url=https://hooks.glip.com/webhook/ \
11112222-3333-4444-5555-666677778888' \
-d "#docs/handlers/wootric/event-example_response-created.txt" \
-H 'Content-Type: application/x-www-form-urlencoded' -v
The specific goal is to get a Wootric webhook event posted to a Lambda function using a URL with query string parameters.
You can get the code here:
https://github.com/grokify/chathooks
The Wootric event body file is here:
https://raw.githubusercontent.com/grokify/chathooks/master/docs/handlers/wootric/event-example_response-created.txt
The GitHub issue is here:
https://github.com/grokify/chathooks/issues/15
The error message seems pretty definitive but I wanted to ask:
Is there a workaround to configure an API Gateway to support both?
Is there a standards-based reason why AWS would not support this or is this just a design decision / limitation?
If there's no solution to this, is there a good lightweight solution other than deploying a hosted server solution like Heroku. Also, do other cloud services support this with their API gateway + cloud functions, like Google?
Some examples showing support for both:
jQuery example: jQuery send GET and POST parameters simultaneously at AJAX request
C# example: Accessing query string variables sent as POST in HttpActionContext
Yes,there is a workaround and the key issue is to set the mapping template that will convert string into json . Very detailed example shown in
API Gateway any content type.
Please set the request property as "Content-Type", "application/json" for your HttpURLConnection like below
connection.setRequestProperty("Content-Type", "application/json");
I had a similar problem, with a 3rd party provider using web hooks. It turns out that my provider is transforming the url path from UPPERCASE to LOWERCASE. Example the endpoint should be apigateway.com/dev/0bscur3dpathRANDOM instead apigateway.com/dev/0bscur3dpathRANDOM. You get the point.
I'm not sure if I got the point in question correctly, but if you want to access the request body that is encoded as application/x-www-form-urlencoded(or anything, actually) in your Lambda function, you should use LAMBDA_PROXY request integration type (aka tick "Use Lambda Proxy integration" checkbox) when creating a method for your resource. Then you can access the request body in event.body field as a plain text in your lambda function and parse it manually.
I have two scenarios for the following API URL.
POST http://{{ip_port}}/oauth/token
When I put the user name and password correctly, it should return
200 and mock json response.
When I put user name and password incorrectly, it should return 401 and mocked json(error).
In Postman Mock server, I noticed that there is no matching algorithm logic for request param.
I want to filter by request param and return related mock responses. I don't want to add two URLs(/token and /failedtoken) for above scenarios.
Currently Postman only support three logic for matching algorithm logic.
Properly formatted responses
HTTP method
Filter by URL
Is there any way to add only one URL for many scenarios in Postman Mock Server?
Postman Mock Server now supports matching by request body. You can use it by specifying a custom header (x-mock-match-request-body to true).
You can also check out an example that demonstrates how this feature works by going to New->Templates and searching for Request Body Matching.
I want to use API Gateway as a caching proxy for an HTTP server, which in turn uses jsonapi-resources to define the API.
The issue is that jsonapi-resources requires query string parameters of the form ?page[number]=10&page[size]=10 to paginate results. However, if I try to add page[number] to URL Query String Parameters on a Method Request page, I receive the following error:
I've also tried to percent-encode the name as page%5Bnumber%5D without any success; the parameter is still filtered out.
Is there a way to make it work?
If you encode the [ by %5B, API Gateway doesn't allow % in the parameter name.
Currently, AWS API Gateway only supports the parameter name matches ^[a-zA-Z0-9._$-]+$
Does page.number work for you?