82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
//go:generate go run github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go generate --world hello --out gen ./wit
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package main
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import (
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"fmt"
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"net/http"
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logger "gitea.rebus.ninja/lore/wasm-nats-producer-client/gen/wasi/logging/logging"
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"gitea.rebus.ninja/lore/wasm-nats-producer-client/gen/wasmcloud/messaging/consumer"
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"gitea.rebus.ninja/lore/wasm-nats-producer-client/gen/wasmcloud/messaging/handler"
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"gitea.rebus.ninja/lore/wasm-nats-producer-client/gen/wasmcloud/messaging/types"
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"github.com/bytecodealliance/wasm-tools-go/cm"
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"go.wasmcloud.dev/component/net/wasihttp"
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)
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type messagingConsumerAdapter struct {
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Publish func(msg types.BrokerMessage) (result cm.Result[string, struct{}, string])
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}
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// NOTE(lxf): this is overridden in tests
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var messagingConsumer = &messagingConsumerAdapter{
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Publish: consumer.Publish,
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}
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func init() {
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wasihttp.HandleFunc(handleHttp)
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handler.Exports.HandleMessage = handleMessage
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}
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func handleHttp(w http.ResponseWriter, r *http.Request) {
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// get body as string
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if handleRequest(r.FormValue("data")) {
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fmt.Fprintf(w, "Message sent!\n")
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} else {
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fmt.Fprintf(w, "Error\n")
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}
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// send response
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}
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func handleMessage(msg types.BrokerMessage) cm.Result[string, struct{}, string]{
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logger.Log(logger.LevelInfo,"MessageHandler", "Received message on subject" + msg.Subject)
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arg := cm.LiftString[string, *uint8, uint8](msg.Body.Data(), uint8(msg.Body.Len()))
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if handleRequest(arg) {
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cm.OK[cm.Result[string, struct{}, string]](struct{}{})
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}
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return cm.Err[cm.Result[string, struct{}, string]]("Couldn't send message to topic")
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}
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func handleRequest(arg string) bool {
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// TODO implement the logic to get the destination topic from the config
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// dest_topic := config.GetAll()
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dest_topic := "streaming"
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result := exec_task(arg)
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// Send reply
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reply := types.BrokerMessage{
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Subject: dest_topic,
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Body: cm.ToList([]byte(result)),
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ReplyTo: cm.None[string](),
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}
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res := messagingConsumer.Publish(reply)
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if res.IsErr() {
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logger.Log(logger.LevelError, "MessageHandler", "Failed to send reply, error: " + *res.Err())
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return false
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}
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return true
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}
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// Since we don't run this program like a CLI, the `main` function is empty. Instead,
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// we call the `handleRequest` function when an HTTP request is received.
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func main() {}
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