Initial commit
UnicodingUnicorn
parent
cfcacfa25f
commit
702afd3d5c
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@ -0,0 +1,12 @@
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# Binaries for programs and plugins
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*.exe
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*.exe~
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*.dll
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*.so
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*.dylib
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# Test binary, built with `go test -c`
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*.test
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# Output of the go coverage tool, specifically when used with LiteIDE
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*.out
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32
README.md
32
README.md
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@ -1,3 +1,33 @@
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# backend-subscribe
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Client subscribe counterpart to backend-publish.
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Client subscribe counterpart to backend-publish. Subscribe to receive the results of your requests to backend-publish in some weird extended streaming async HTTP-ish thing.
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## API
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```
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GET /subscribe/:userid/client/:clientid
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```
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Subscribe to your SSE stream.
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### URL Params
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In the future, this will be supplied via token.
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| Name | Type | Description | Required |
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| ---- | ---- | ----------- | -------- |
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| userid | String | User's ID. | ✓ |
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| clientid | String | Device's ID. Must be unique to the device. I suggest something based on MAC address. | ✓ |
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### Success Response (200 OK)
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An [EventSource](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) stream.
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### Event
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```
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{
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"code": <http status code>
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"message": <message>
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}
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```
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@ -0,0 +1,84 @@
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// Code generated by protoc-gen-go. DO NOT EDIT.
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// source: client.proto
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package main
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import (
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fmt "fmt"
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proto "github.com/golang/protobuf/proto"
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math "math"
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)
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// Reference imports to suppress errors if they are not otherwise used.
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var _ = proto.Marshal
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var _ = fmt.Errorf
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var _ = math.Inf
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// This is a compile-time assertion to ensure that this generated file
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// is compatible with the proto package it is being compiled against.
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// A compilation error at this line likely means your copy of the
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// proto package needs to be updated.
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const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
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type Client struct {
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Key string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
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Client string `protobuf:"bytes,2,opt,name=client,proto3" json:"client,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *Client) Reset() { *m = Client{} }
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func (m *Client) String() string { return proto.CompactTextString(m) }
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func (*Client) ProtoMessage() {}
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func (*Client) Descriptor() ([]byte, []int) {
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return fileDescriptor_014de31d7ac8c57c, []int{0}
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}
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func (m *Client) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_Client.Unmarshal(m, b)
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}
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func (m *Client) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_Client.Marshal(b, m, deterministic)
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}
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func (m *Client) XXX_Merge(src proto.Message) {
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xxx_messageInfo_Client.Merge(m, src)
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}
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func (m *Client) XXX_Size() int {
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return xxx_messageInfo_Client.Size(m)
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}
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func (m *Client) XXX_DiscardUnknown() {
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xxx_messageInfo_Client.DiscardUnknown(m)
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}
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var xxx_messageInfo_Client proto.InternalMessageInfo
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func (m *Client) GetKey() string {
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if m != nil {
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return m.Key
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}
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return ""
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}
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func (m *Client) GetClient() string {
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if m != nil {
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return m.Client
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}
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return ""
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}
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func init() {
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proto.RegisterType((*Client)(nil), "main.Client")
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}
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func init() { proto.RegisterFile("client.proto", fileDescriptor_014de31d7ac8c57c) }
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var fileDescriptor_014de31d7ac8c57c = []byte{
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// 83 bytes of a gzipped FileDescriptorProto
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0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x49, 0xce, 0xc9, 0x4c,
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0xcd, 0x2b, 0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0xc9, 0x4d, 0xcc, 0xcc, 0x53, 0x32,
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0xe2, 0x62, 0x73, 0x06, 0x8b, 0x0a, 0x09, 0x70, 0x31, 0x67, 0xa7, 0x56, 0x4a, 0x30, 0x2a, 0x30,
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0x6a, 0x70, 0x06, 0x81, 0x98, 0x42, 0x62, 0x5c, 0x6c, 0x10, 0x1d, 0x12, 0x4c, 0x60, 0x41, 0x28,
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0x2f, 0x89, 0x0d, 0x6c, 0x80, 0x31, 0x20, 0x00, 0x00, 0xff, 0xff, 0x95, 0x71, 0x3f, 0xbd, 0x50,
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0x00, 0x00, 0x00,
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}
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@ -0,0 +1,118 @@
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"log"
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"net/http"
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"time"
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"github.com/julienschmidt/httprouter"
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"github.com/nats-io/go-nats"
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"github.com/golang/protobuf/proto"
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)
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type RawClient struct {
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UserId string
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ClientId string
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}
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type JsonResponse struct {
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Code uint32 `json:"code"`
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Message string `json:"message"`
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}
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var listen string
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var natsHost string
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var nc *nats.Conn
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var connections map[RawClient]chan []byte
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func main() {
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// Parse flags
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flag.StringVar(&listen, "listen", ":8080", "host and port to listen on")
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flag.StringVar(&natsHost, "nats", "nats://localhost:4222", "host and port of NATS")
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flag.Parse()
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connections = make(map[RawClient]chan []byte)
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// Routes
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router := httprouter.New()
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router.GET("/subscribe/:userid/client/:clientid", Subscribe)
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// NATS
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var err error
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nc, err = nats.Connect(natsHost)
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if err != nil {
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log.Fatal(err)
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}
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nc.Subscribe("res", ResponseHandler)
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// Start server
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log.Printf("starting server on %s", listen)
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log.Fatal(http.ListenAndServe(listen, router))
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}
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func Subscribe(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
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flusher, ok := w.(http.Flusher)
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if !ok {
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("Connection", "keep-alive")
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client := RawClient {
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UserId: p.ByName("userid"),
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ClientId: p.ByName("clintid"),
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}
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recv := make(chan []byte)
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connections[client] = recv;
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// Refresh connection periodically
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resClosed := w.(http.CloseNotifier).CloseNotify()
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ticker := time.NewTicker(25 * time.Second)
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for {
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select {
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case msg := <- recv:
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fmt.Fprintf(w, "data: %s\n\n", msg)
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flusher.Flush()
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case <- ticker.C:
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w.Write([]byte(":\n\n"))
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case <- resClosed:
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ticker.Stop()
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delete(connections, client)
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return
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}
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}
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}
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func ResponseHandler(msg *nats.Msg) {
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response := Response {}
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if err := proto.Unmarshal(msg.Data, &response); err != nil { // Fail quietly
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log.Println(err)
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return
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}
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client := RawClient {
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UserId: response.Client.Key,
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ClientId: response.Client.Client,
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}
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connection, present := connections[client]
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if present {
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res := JsonResponse {
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Code: response.Code,
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Message: string(response.Message),
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}
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json_string, err := json.Marshal(res)
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if err != nil {
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log.Println(err)
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return
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}
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connection <- []byte(json_string)
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}
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}
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@ -0,0 +1,95 @@
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// Code generated by protoc-gen-go. DO NOT EDIT.
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// source: response.proto
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package main
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import (
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fmt "fmt"
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proto "github.com/golang/protobuf/proto"
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math "math"
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)
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// Reference imports to suppress errors if they are not otherwise used.
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var _ = proto.Marshal
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var _ = fmt.Errorf
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var _ = math.Inf
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// This is a compile-time assertion to ensure that this generated file
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// is compatible with the proto package it is being compiled against.
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// A compilation error at this line likely means your copy of the
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// proto package needs to be updated.
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const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
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type Response struct {
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Code uint32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
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Message []byte `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
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Client *Client `protobuf:"bytes,3,opt,name=client,proto3" json:"client,omitempty"`
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XXX_NoUnkeyedLiteral struct{} `json:"-"`
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XXX_unrecognized []byte `json:"-"`
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XXX_sizecache int32 `json:"-"`
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}
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func (m *Response) Reset() { *m = Response{} }
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func (m *Response) String() string { return proto.CompactTextString(m) }
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func (*Response) ProtoMessage() {}
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func (*Response) Descriptor() ([]byte, []int) {
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return fileDescriptor_0fbc901015fa5021, []int{0}
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}
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func (m *Response) XXX_Unmarshal(b []byte) error {
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return xxx_messageInfo_Response.Unmarshal(m, b)
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}
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func (m *Response) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
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return xxx_messageInfo_Response.Marshal(b, m, deterministic)
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}
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func (m *Response) XXX_Merge(src proto.Message) {
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xxx_messageInfo_Response.Merge(m, src)
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}
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func (m *Response) XXX_Size() int {
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return xxx_messageInfo_Response.Size(m)
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}
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func (m *Response) XXX_DiscardUnknown() {
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xxx_messageInfo_Response.DiscardUnknown(m)
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}
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var xxx_messageInfo_Response proto.InternalMessageInfo
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func (m *Response) GetCode() uint32 {
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if m != nil {
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return m.Code
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}
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return 0
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}
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func (m *Response) GetMessage() []byte {
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if m != nil {
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return m.Message
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}
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return nil
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}
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func (m *Response) GetClient() *Client {
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if m != nil {
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return m.Client
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}
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return nil
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}
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func init() {
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proto.RegisterType((*Response)(nil), "main.Response")
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}
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func init() { proto.RegisterFile("response.proto", fileDescriptor_0fbc901015fa5021) }
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var fileDescriptor_0fbc901015fa5021 = []byte{
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// 129 bytes of a gzipped FileDescriptorProto
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0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x2b, 0x4a, 0x2d, 0x2e,
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0xc8, 0xcf, 0x2b, 0x4e, 0xd5, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0xc9, 0x4d, 0xcc, 0xcc,
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0x93, 0xe2, 0x49, 0xce, 0xc9, 0x4c, 0xcd, 0x2b, 0x81, 0x88, 0x29, 0xc5, 0x71, 0x71, 0x04, 0x41,
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0x55, 0x09, 0x09, 0x71, 0xb1, 0x24, 0xe7, 0xa7, 0xa4, 0x4a, 0x30, 0x2a, 0x30, 0x6a, 0xf0, 0x06,
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0x81, 0xd9, 0x42, 0x12, 0x5c, 0xec, 0xb9, 0xa9, 0xc5, 0xc5, 0x89, 0xe9, 0xa9, 0x12, 0x4c, 0x0a,
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0x8c, 0x1a, 0x3c, 0x41, 0x30, 0xae, 0x90, 0x0a, 0x17, 0x1b, 0xc4, 0x24, 0x09, 0x66, 0x05, 0x46,
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0x0d, 0x6e, 0x23, 0x1e, 0x3d, 0x90, 0xf1, 0x7a, 0xce, 0x60, 0xb1, 0x20, 0xa8, 0x5c, 0x12, 0x1b,
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0xd8, 0x1a, 0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0x14, 0x8c, 0xe3, 0xa3, 0x8c, 0x00, 0x00,
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0x00,
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}
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