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api.go
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api.go
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package main
import (
"code.google.com/p/go-uuid/uuid"
"fmt"
"github.com/gorilla/mux"
"net/http"
"strconv"
"sync"
"time"
)
type MockApi struct {
EndpointsMutex sync.Mutex
Endpoints map[string]*Endpoint
}
func NewMockApi() *MockApi {
api := new(MockApi)
api.Endpoints = make(map[string]*Endpoint)
return api
}
func (api *MockApi) Register(router *mux.Router) {
router.HandleFunc("/response/{status:[2345][0-9][0-9]}", api.ResponseHandler)
router.HandleFunc("/response/{status:[2345][0-9][0-9]}/{path:[- \\w\\/]+}", api.ResponseHandler)
router.HandleFunc("/timeout/{timeout:[0-9]+}", api.TimeoutHandler).Methods("GET")
router.HandleFunc("/timeout/{timeout:[0-9]+}/{path:[- \\w\\/]+}", api.TimeoutHandler).Methods("GET")
router.HandleFunc("/timeout/{min:[0-9]+},{median:[0-9]+},{max:[0-9]+}", api.TimeoutHandler).Methods("GET")
router.HandleFunc("/timeout/{min:[0-9]+},{median:[0-9]+},{max:[0-9]+}", api.TimeoutHandler).Methods("GET")
router.HandleFunc("/mock", api.MockHandler).Methods("POST")
router.HandleFunc("/mock/{endpoint}", api.MockEndpointHandler).Methods("POST")
router.HandleFunc("/mock/{endpoint}/{path:[- \\w\\/]+}", api.MockEndpointHandler).Methods("POST")
router.HandleFunc("/endpoint/{endpoint}", api.EndpointHandler).Methods("GET")
router.HandleFunc("/endpoint/{endpoint}/{path:[- \\w\\/]+}", api.EndpointHandler).Methods("GET")
router.HandleFunc("/settings/{endpoint}", api.SettingsHandler).Methods("GET", "POST")
}
// /response/{status:[2345][0-9][0-9]}
// Returns the specified status code
func (api *MockApi) ResponseHandler(rw http.ResponseWriter, req *http.Request) {
status, _ := strconv.Atoi(mux.Vars(req)["status"])
rw.WriteHeader(status)
}
// /mock
// Creates a uuid endpoint which will always return 200 and the specified payload
func (api *MockApi) MockHandler(rw http.ResponseWriter, req *http.Request) {
api.EndpointsMutex.Lock()
defer api.EndpointsMutex.Unlock()
endpointName := uuid.NewUUID().String()
endpoint := NewEndpoint()
endpoint.AddResponse(req, "")
api.Endpoints[endpointName] = endpoint
rw.WriteHeader(http.StatusOK)
rw.Write([]byte(endpointName))
}
// /mock/{endpoint}
// Adds to the endpoint for the given query parameters, when requested with those parameters will return the specified payload
func (api *MockApi) MockEndpointHandler(rw http.ResponseWriter, req *http.Request) {
api.EndpointsMutex.Lock()
defer api.EndpointsMutex.Unlock()
vars := mux.Vars(req)
endpointName := vars["endpoint"]
path := vars["path"]
endpoint, endpointOk := api.Endpoints[endpointName]
if !endpointOk {
endpoint = NewEndpoint()
api.Endpoints[endpointName] = endpoint
}
endpoint.AddResponse(req, path)
rw.WriteHeader(http.StatusOK)
rw.Write([]byte(endpointName))
}
func (api *MockApi) serveEndpoint(endpoint *Endpoint, rw http.ResponseWriter, req *http.Request) {
path := mux.Vars(req)["path"]
response, responseOk := endpoint.Lookup(req, path)
if !responseOk {
http.Error(rw, "No response for given parameters", http.StatusBadRequest)
return
}
endpoint.LatencyInjector()
rw.Header().Set("Content-Type", response.ContentType)
rw.WriteHeader(http.StatusOK)
rw.Write(response.Content)
}
// /endpoint/{endpoint}
// Mocked request, matches against the endpoint and option query parameters to find and return the payload, 400 if no parameter, 404 is no endpoint
func (api *MockApi) EndpointHandler(rw http.ResponseWriter, req *http.Request) {
endpointName := mux.Vars(req)["endpoint"]
endpoint, endpointOk := api.Endpoints[endpointName]
if !endpointOk {
http.Error(rw, "Endpoint does not exist", http.StatusNotFound)
return
}
api.serveEndpoint(endpoint, rw, req)
}
// /settings/{endpoint}
// Sets a value for the given endpoint
func (api *MockApi) SettingsHandler(rw http.ResponseWriter, req *http.Request) {
api.EndpointsMutex.Lock()
defer api.EndpointsMutex.Unlock()
endpointName := mux.Vars(req)["endpoint"]
endpoint, endpointOk := api.Endpoints[endpointName]
if !endpointOk {
http.Error(rw, "Endpoint does not exist", http.StatusNotFound)
return
}
latency := req.FormValue("latency")
if latency != "" {
if latency == "static" {
latencyMsStr := req.FormValue("latency_ms")
latencyMs, latencyMsErr := strconv.ParseInt(latencyMsStr, 10, 64)
if latencyMsErr != nil {
fmt.Fprintf(rw, "Invalid static latency valid %q\n", latencyMsErr.Error())
}
endpoint.SetLatencyInjector(NewStaticLatencyInjector(latencyMs))
} else if latency == "normal" {
latencyMinMsStr := req.FormValue("latency_min_ms")
latencyMedianMsStr := req.FormValue("latency_median_ms")
latencyMaxMsStr := req.FormValue("latency_max_ms")
latencyMinMs, latencyMinMsErr := strconv.ParseInt(latencyMinMsStr, 10, 64)
latencyMedianMs, latencyMedianMsErr := strconv.ParseInt(latencyMedianMsStr, 10, 64)
latencyMaxMs, latencyMaxMsErr := strconv.ParseInt(latencyMaxMsStr, 10, 64)
hasLatencyErr := (latencyMinMsErr != nil || latencyMedianMsErr != nil || latencyMaxMsErr != nil)
if hasLatencyErr {
rw.WriteHeader(http.StatusBadRequest)
}
if latencyMinMsErr != nil {
fmt.Fprintf(rw, "Invalid minimum latency valid %q\n", latencyMinMsErr.Error())
}
if latencyMedianMsErr != nil {
fmt.Fprintf(rw, "Invalid median latency valid %q\n", latencyMedianMsErr.Error())
}
if latencyMaxMsErr != nil {
fmt.Fprintf(rw, "Invalid maximum latency valid %q\n", latencyMaxMsErr.Error())
}
if hasLatencyErr {
return
}
endpoint.SetLatencyInjector(NewNormalLatencyInjector(time.Now().UTC().UnixNano(), float64(latencyMinMs), float64(latencyMedianMs), float64(latencyMaxMs)))
} else if latency == "none" {
endpoint.SetLatencyInjector(NewNoLatencyInjector())
} else {
rw.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(rw, "Invalid latency %q\n", latency)
return
}
}
rw.WriteHeader(http.StatusOK)
}