Esempio n. 1
0
// serviceHandler handlers post request to "/jobs"
func serviceHandler(w http.ResponseWriter, r *http.Request) {
	pathlist, requestType, err := parseURI(r, "/jobs/")
	if err != nil || len(pathlist) != 0 {
		badRequest(w, "Error: incorrectly formatted request")
		return
	}
	if requestType != "post" {
		badRequest(w, "only supports posts")
		return
	}

	// read json
	decoder := json.NewDecoder(r.Body)
	var json_data map[string]interface{}
	err = decoder.Decode(&json_data)

	// convert schema to json data
	var schema_data interface{}
	json.Unmarshal([]byte(serviceSchema), &schema_data)

	// validate json schema
	schema, err := gojsonschema.NewJsonSchemaDocument(schema_data)
	validationResult := schema.Validate(json_data)
	if !validationResult.Valid() {
		badRequest(w, "JSON did not pass validation")
		return
	}

	var addRequest AddRequest
	addRequest.num1 = int(json_data["num1"].(float64))
	addRequest.num2 = int(json_data["num2"].(float64))
	if err != nil {
		badRequest(w, "JSON not formatted properly")
		return
	}

	jobid := randomHex()
	var empty interface{}
	jobResults.Results[jobid] = empty
	addRequest.name = jobid

	w.Header().Set("Content-Type", "application/json")
	jsondata, _ := json.Marshal(map[string]string{
		"result-callback": "http://" + webAddress + "/jobs/" + jobid,
	})
	fmt.Fprintf(w, string(jsondata))

	// non-blocking call to actual service
	go addService(addRequest)
}
Esempio n. 2
0
func extractBodies(w http.ResponseWriter, json_data map[string]interface{}, schemaData string) (sparse_bodies sparseBodies, err error) {
	// convert schema to json data
	var schema_data interface{}
	json.Unmarshal([]byte(schemaData), &schema_data)

	// validate json schema
	schema, err := gojsonschema.NewJsonSchemaDocument(schema_data)
	validationResult := schema.Validate(json_data)
	if !validationResult.Valid() {
		badRequest(w, "JSON did not pass validation")
		err = fmt.Errorf("JSON did not pass validation")
		return
	}

	// retrieve dvid server
	dvidserver, err := getDVIDserver(json_data)
	if err != nil {
		badRequest(w, "DVID server could not be located on proxy")
		return
	}

	// get data uuid
	uuid := json_data["uuid"].(string)

	// base url for all dvid queries
	baseurl := dvidserver + "/api/node/" + uuid + "/sp2body/sparsevol/"

	bodyinter_list := json_data["bodies"].([]interface{})
	for _, bodyinter := range bodyinter_list {
		bodyid := int(bodyinter.(float64))
		url := baseurl + strconv.Itoa(bodyid)

		resp, err2 := http.Get(url)
		if err2 != nil || resp.StatusCode != 200 {
			badRequest(w, "Body could not be read from "+url)
			err = fmt.Errorf("Body could not be read")
			return
		}
		defer resp.Body.Close()

		// not examing initial body data for now
		var junk uint32
		binary.Read(resp.Body, binary.LittleEndian, &junk)
		binary.Read(resp.Body, binary.LittleEndian, &junk)

		var numspans uint32
		binary.Read(resp.Body, binary.LittleEndian, &numspans)

		sparse_body := sparseBody{}
		sparse_body.bodyID = uint32(bodyid)

		for iter := 0; iter < int(numspans); iter += 1 {
			var x, y, z, run int32
			err = binary.Read(resp.Body, binary.LittleEndian, &x)
			if err != nil {
				badRequest(w, "Sparse body encoding incorrect")
				return
			}
			err = binary.Read(resp.Body, binary.LittleEndian, &y)
			if err != nil {
				badRequest(w, "Sparse body encoding incorrect")
				return
			}
			err = binary.Read(resp.Body, binary.LittleEndian, &z)
			if err != nil {
				badRequest(w, "Sparse body encoding incorrect")
				return
			}
			err = binary.Read(resp.Body, binary.LittleEndian, &run)
			if err != nil {
				badRequest(w, "Sparse body encoding incorrect")
				return
			}

			sparse_data := sparseData{x, y, z, run}

			sparse_body.rle = append(sparse_body.rle, sparse_data)
		}
		sparse_bodies = append(sparse_bodies, sparse_body)
	}

	return

}