diff --git a/ballerina/Package.md b/ballerina/Package.md deleted file mode 100644 index 5830198845..0000000000 --- a/ballerina/Package.md +++ /dev/null @@ -1,109 +0,0 @@ -## Package overview - -This package provides APIs for connecting and interacting with HTTP and HTTP2 endpoints. It -facilitates two types of network entry points as the `Client` and `Listener`. - -### Client - -The `Client` is used to connect to and interact with HTTP endpoints. They support connection pooling and can be -configured to have a maximum number of active connections that can be made with the remote endpoint. The `Client` -activates connection eviction after a given idle period and also supports follow-redirects so that you do not -have to manually handle 3xx HTTP status codes. - -#### Resiliency - -The `Client` handles resilience in multiple ways such as load balancing, circuit breaking, endpoint timeouts, and via a -retry mechanism. - -Load balancing is used in the round-robin or failover manner. - -When a failure occurs in the remote service, the client connections might wait for some time before a timeout occurs. -Awaiting requests consume resources in the system. Circuit Breakers are used to trip after a certain number of failed -requests to the remote service. Once a circuit breaker trips, it does not allow the client to send requests to the -remote service for a period of time. - -The Ballerina circuit breaker supports tripping on HTTP error status codes and I/O errors. Failure thresholds can be -configured based on a sliding window (e.g., 5 failures within 10 seconds). The `Client` also supports a retry -mechanism that allows it to resend failed requests periodically for a given number of times. - -#### Security - -The `Client` supports Server Name Indication (SNI), Certificate Revocation List (CRL), Online Certificate Status -Protocol (OCSP), and OCSP Stapling for SSL/TLS connections. -Also, the `Client` can be configured to send authentication information to the endpoint being invoked. Ballerina has -built-in support for Basic authentication, JWT authentication, and OAuth2 authentication. - -In addition to that, it supports both HTTP/1.1 and HTTP2 protocols and connection keep-alive, content -chunking, HTTP caching, data compression/decompression, response payload binding, and authorization can be highlighted as the features of the `Clients`. - -A `Client` can be defined using the URL of the remote service that it needs to connect with as shown below: - -```ballerina -http:Client clientEndpoint = check new("https://my-simple-backend.com"); -``` -The defined `Client` endpoint can be used to call a remote service as follows: - -```ballerina -// Send a GET request to the specified endpoint. -http:Response response = check clientEndpoint->get("/get?id=123"); -``` -The payload can be retrieved as the return value from the remote function as follows: - -```ballerina -// Retrieve payload as json. -json payload = check clientEndpoint->post("/backend/Json", "foo"); -``` - -### Listener - -The `Listener` is the underneath server connector that binds the given IP/Port to the network and it's behavior can -be changed using the `http:ListenerConfiguration`. In HTTP, the `http:Service`-typed services can be attached to -the `Listener`. The service type precisely describes the syntax for both the service and resource. - -A `Service` represents a collection of network-accessible entry points and can be exposed via a `Listener` endpoint. -A resource represents one such entry point and can have its own path, HTTP methods, body format, `consumes` and -`produces` content types, CORS headers, etc. In resources, the HTTP method and resource path are mandatory parameters and -the String literal and path parameters can be stated as the path. The resource function accepts the `http:Caller`, `http:Request`, -`http:Headers`, query parameters, header parameters, and payload parameters as arguments. However, they are optional. - -When a `Service` receives a request, it is dispatched to the best-matched resource. - -A `Listener` endpoint can be defined as follows: - -```ballerina -// Attributes associated with the `Listener` endpoint are defined here. -listener http:Listener helloWorldEP = new(9090); -``` - -Then a `Service` can be defined and attached to the above `Listener` endpoint as shown below: - -```ballerina -// By default, Ballerina assumes that the service is to be exposed via HTTP/1.1. -service /helloWorld on helloWorldEP { - - resource function post [string name](@http:Payload string message) returns string { - // Sends the response back to the client along with a string payload. - return "Hello, World! I’m " + name + ". " + message; - } -} -``` - -#### Security - -`Listener` endpoints can be exposed via SSL. They support Mutual SSL, Hostname Verification, and Application Layer -Protocol Negotiation (ALPN) for HTTP2. `Listener` endpoints also support Certificate Revocation List (CRL), Online -Certificate Status Protocol (OCSP), and OCSP Stapling. -Also, The `listener` can be configured to authenticate and authorize the inbound requests. Ballerina has -built-in support for basic authentication, JWT authentication, and OAuth2 authentication. - -In addition to that, supports both the HTTP/1.1 and HTTP2 protocols and connection keep-alive, content -chunking, HTTP caching, data compression/decompression, payload binding, and authorization can be highlighted as the features of a `Service`. - -## Report issues - -To report bugs, request new features, start new discussions, view project boards, etc., go to the [Ballerina standard library parent repository](https://github.com/ballerina-platform/ballerina-standard-library). - -## Useful links - -- Chat live with us via our [Discord server](https://discord.gg/ballerinalang). -- Post all technical questions on Stack Overflow with the [#ballerina](https://stackoverflow.com/questions/tagged/ballerina) tag. \ No newline at end of file diff --git a/ballerina/Module.md b/ballerina/README.md similarity index 100% rename from ballerina/Module.md rename to ballerina/README.md diff --git a/ballerina/modules/httpscerr/Module.md b/ballerina/modules/httpscerr/README.md similarity index 100% rename from ballerina/modules/httpscerr/Module.md rename to ballerina/modules/httpscerr/README.md