Golang respond.ParseAcceptHeader函数代码示例

// List returns a list of factors (weights) per endpoint group (i.e. site)
func List(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output = []byte(http.StatusText(http.StatusUnauthorized))
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	session, err := mongo.OpenSession(tenantDbConfig)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}
	defer mongo.CloseSession(session)

	results := []FactorsOutput{}
	err = mongo.Find(session, tenantDbConfig.Db, "weights", nil, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	output, err = createView(results, contentType) //Render the results into XML format

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	mongo.CloseSession(session)
	return code, h, output, err
}

// List existing recomputations
func List(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {
	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	// contentType := "application/json"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	urlValues := r.URL.Query()
	contentType := r.Header.Get("Accept")

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	filter := IncomingRecomputation{
		StartTime: urlValues.Get("start_time"),
		EndTime:   urlValues.Get("end_time"),
		Reason:    urlValues.Get("reason"),
		Report:    urlValues.Get("report"),
	}

	session, err := mongo.OpenSession(tenantDbConfig)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	results := []MongoInterface{}
	err = mongo.Find(session, tenantDbConfig.Db, recomputationsColl, filter, "timestamp", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	output, err = createListView(results, contentType)

	return code, h, output, err

}

// List returns a list of factors (weights) per endpoint group (i.e. site)
func List(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	// Grab Tenant DB configuration from context
	tenantDbConfig := context.Get(r, "tenant_conf").(config.MongoConfig)

	session, err := mongo.OpenSession(tenantDbConfig)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}
	defer mongo.CloseSession(session)

	results := []FactorsOutput{}
	err = mongo.Find(session, tenantDbConfig.Db, "weights", nil, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	output, err = createView(results, contentType) //Render the results into XML format

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	mongo.CloseSession(session)
	return code, h, output, err
}

// SubmitRecomputation insert a new pending recomputation in the tenants database
func SubmitRecomputation(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {
	//STANDARD DECLARATIONS START
	code := http.StatusAccepted
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	contentType, err := respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	session, err := mongo.OpenSession(tenantDbConfig)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	var recompSubmission IncomingRecomputation
	// urlValues := r.URL.Query()

	body, err := ioutil.ReadAll(io.LimitReader(r.Body, cfg.Server.ReqSizeLimit))
	if err != nil {
		panic(err)
	}
	if err := r.Body.Close(); err != nil {
		panic(err)
	}
	if err := json.Unmarshal(body, &recompSubmission); err != nil {
		code = 422 // unprocessable entity
		output = []byte("Unprocessable JSON")
		return code, h, output, err
	}
	now := time.Now()
	recomputation := MongoInterface{
		ID:             mongo.NewUUID(),
		RequesterName:  tenantDbConfig.User,
		RequesterEmail: tenantDbConfig.Email,
		StartTime:      recompSubmission.StartTime,
		EndTime:        recompSubmission.EndTime,
		Reason:         recompSubmission.Reason,
		Report:         recompSubmission.Report,
		Exclude:        recompSubmission.Exclude,
		Timestamp:      now.Format("2006-01-02 15:04:05"),
		Status:         "pending",
	}

	err = mongo.Insert(session, tenantDbConfig.Db, recomputationsColl, recomputation)

	if err != nil {
		panic(err)
	}

	output, err = createSubmitView(recomputation, contentType, r)
	return code, h, output, err
}

// Create function is used to implement the create tenant request.
// The request is an http POST request with the tenant description
// provided as json structure in the request body
func Create(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	// Content Negotiation
	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	// if authentication procedure fails then
	// return unauthorized http status
	if authentication.AuthenticateAdmin(r.Header, cfg) == false {

		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	// Try ingest request body
	body, err := ioutil.ReadAll(io.LimitReader(r.Body, cfg.Server.ReqSizeLimit))
	if err != nil {
		panic(err)
	}
	if err := r.Body.Close(); err != nil {
		panic(err)
	}

	incoming := Tenant{}

	// Parse body json
	if err := json.Unmarshal(body, &incoming); err != nil {

		output, _ = respond.MarshalContent(respond.BadRequestBadJSON, contentType, "", " ")
		code = http.StatusBadRequest
		return code, h, output, err
	}

	// Try to open the mongo session
	session, err := mongo.OpenSession(cfg.MongoDB)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Check if name exists
	sameName := []Tenant{}
	filter := bson.M{"info.name": incoming.Info.Name}
	err = mongo.Find(session, cfg.MongoDB.Db, "tenants", filter, "name", &sameName)

	if len(sameName) > 0 {
		code = http.StatusConflict
		output, err = createMsgView("Tenant with same name already exists", code)
		return code, h, output, err
	}

	// Generate new id
	incoming.ID = mongo.NewUUID()
	incoming.Info.Created = time.Now().Format("2006-01-02 15:04:05")
	incoming.Info.Updated = incoming.Info.Created
	err = mongo.Insert(session, cfg.MongoDB.Db, "tenants", incoming)

	if err != nil {
		panic(err)
	}

	// Create view of the results
	output, err = createRefView(incoming, "Tenant was succesfully created", 201, r) //Render the results into JSON
	code = http.StatusCreated
	return code, h, output, err
}

// Delete function used to implement remove tenant request
func Delete(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	// Content Negotiation
	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	vars := mux.Vars(r)

	// if authentication procedure fails then
	// return unauthorized
	if authentication.AuthenticateAdmin(r.Header, cfg) == false {

		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	// Try to open the mongo session
	session, err := mongo.OpenSession(cfg.MongoDB)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	filter := bson.M{"id": vars["ID"]}

	// Retrieve Results from database
	results := []Tenant{}
	err = mongo.Find(session, cfg.MongoDB.Db, "tenants", filter, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Check if nothing found
	if len(results) < 1 {
		output, _ = respond.MarshalContent(respond.NotFound, contentType, "", " ")
		code = http.StatusNotFound
		return code, h, output, err
	}

	mongo.Remove(session, cfg.MongoDB.Db, "tenants", filter)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Create view of the results
	output, err = createMsgView("Tenant Successfully Deleted", 200) //Render the results into JSON

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
	return code, h, output, err

}

// Update function used to implement update tenant request.
// This is an http PUT request that gets a specific tenant's name
// as a urlvar parameter input and a json structure in the request
// body in order to update the datastore document for the specific
// tenant
func Update(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	// Content Negotiation
	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	vars := mux.Vars(r)

	// if authentication procedure fails then
	// return unauthorized
	if authentication.AuthenticateAdmin(r.Header, cfg) == false {

		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err

	}

	incoming := Tenant{}

	// ingest body data
	body, err := ioutil.ReadAll(io.LimitReader(r.Body, cfg.Server.ReqSizeLimit))
	if err != nil {
		panic(err)
	}
	if err := r.Body.Close(); err != nil {
		panic(err)
	}
	// parse body json
	if err := json.Unmarshal(body, &incoming); err != nil {
		output, _ = respond.MarshalContent(respond.BadRequestBadJSON, contentType, "", " ")
		code = http.StatusBadRequest
		return code, h, output, err
	}

	// Try to open the mongo session
	session, err := mongo.OpenSession(cfg.MongoDB)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// create filter to retrieve specific profile with id
	filter := bson.M{"id": vars["ID"]}

	incoming.ID = vars["ID"]

	// Retrieve Results from database
	results := []Tenant{}
	err = mongo.Find(session, cfg.MongoDB.Db, "tenants", filter, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Check if nothing found
	if len(results) < 1 {

		output, _ = respond.MarshalContent(respond.NotFound, contentType, "", " ")
		code = http.StatusNotFound
		return code, h, output, err
	}

	// If user chose to change name - check if name already exists
	if results[0].Info.Name != incoming.Info.Name {
		sameName := []Tenant{}
		filter = bson.M{"info.name": incoming.Info.Name}

		err = mongo.Find(session, cfg.MongoDB.Db, "tenants", filter, "name", &sameName)

		if len(sameName) > 1 {
			code = http.StatusConflict
			output, err = createMsgView("Tenant with same name already exists", code)
			return code, h, output, err
		}
	}

	// run the update query
	incoming.Info.Created = results[0].Info.Created

	incoming.Info.Updated = time.Now().Format("2006-01-02 15:04:05")
	filter = bson.M{"id": vars["ID"]}
//.........这里部分代码省略.........

// ListOne function implement an http GET request that accepts
// a name parameter urlvar and retrieves information only for the
// specific tenant
func ListOne(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	vars := mux.Vars(r)

	// Content Negotiation
	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	// if authentication procedure fails then
	// return unauthorized http status
	if authentication.AuthenticateAdmin(r.Header, cfg) == false {

		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	// Try to open the mongo session
	session, err := mongo.OpenSession(cfg.MongoDB)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Create structure to hold query results
	results := []Tenant{}

	// Create a simple query object to query by id
	query := bson.M{"id": vars["ID"]}
	// Query collection tenants for the specific tenant id
	err = mongo.Find(session, cfg.MongoDB.Db, "tenants", query, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Check if nothing found
	if len(results) < 1 {
		output, _ = respond.MarshalContent(respond.NotFound, contentType, "", " ")
		code = http.StatusNotFound
		return code, h, output, err
	}

	// After successfully retrieving the db results
	// call the createView function to render them into idented xml
	output, err = createListView(results, "Success", code)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
	return code, h, output, err
}

// ListOne function that implements the http GET request that retrieves
// all avaiable report information
func ListOne(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	//Extracting urlvar "name" from url path

	id := mux.Vars(r)["id"]
	// Try to open the mongo session
	session, err := mongo.OpenSession(tenantDbConfig)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Create structure for storing query results
	result := MongoInterface{}
	// Create a simple query object to query by name
	query := bson.M{"id": id}
	// Query collection tenants for the specific tenant name
	err = mongo.FindOne(session, tenantDbConfig.Db, reportsColl, query, &result)

	// If query returned zero result then no tenant matched this name,
	// abort and notify user accordingly
	if err != nil {
		code = http.StatusNotFound
		output, _ := ReportNotFound(contentType)
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	// After successfully retrieving the db results
	// call the createView function to render them into idented xml
	output, err = createView([]MongoInterface{result}, contentType)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	code = http.StatusOK
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
	return code, h, output, err
}

// List the existing metric profiles for the tenant making the request
// Also there is an optional url param "name" to filter results by
func List(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	// Content Negotiation
	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	urlValues := r.URL.Query()

	// Tenant Authentication
	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	// Open session to tenant database
	session, err := mongo.OpenSession(tenantDbConfig)
	defer mongo.CloseSession(session)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Retrieve Results from database

	var filter interface{}
	if len(urlValues["name"]) > 0 {
		filter = bson.M{"name": urlValues["name"][0]}
	} else {
		filter = nil
	}

	results := []MongoInterface{}
	err = mongo.Find(session, tenantDbConfig.Db, "metric_profiles", filter, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Create view of the results
	output, err = createListView(results, "Success", code) //Render the results into JSON

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
	return code, h, output, err
}

// Create function is used to implement the create report request.
// The request is an http POST request with the report description
// provided as json structure in the request body
func Create(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusCreated
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	//Reading the json input from the request body
	reqBody, err := ioutil.ReadAll(io.LimitReader(r.Body, cfg.Server.ReqSizeLimit))

	if err != nil {
		return code, h, output, err
	}
	input := MongoInterface{}
	//Unmarshalling the json input into byte form

	err = json.Unmarshal(reqBody, &input)

	// Check if json body is malformed
	if err != nil {
		output, _ := respond.MarshalContent(respond.MalformedJSONInput, contentType, "", " ")
		code = http.StatusBadRequest
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	// Try to open the mongo session
	session, err := mongo.OpenSession(tenantDbConfig)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Validate profiles given in report
	validationErrors := input.ValidateProfiles(session.DB(tenantDbConfig.Db))

	if len(validationErrors) > 0 {
		code = 422
		out := respond.UnprocessableEntity
		out.Errors = validationErrors
		output = out.MarshalTo(contentType)
		return code, h, output, err
	}

	// Prepare structure for storing query results
	results := []MongoInterface{}

	// Check if report with the same name exists in datastore
	query := searchName(input.Info.Name)
	err = mongo.Find(session, tenantDbConfig.Db, reportsColl, query, "name", &results)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// If results are returned for the specific name
	// then we already have an existing report and we must
	// abort creation notifing the user
	if len(results) > 0 {
		// Name was found so print the error message in xml
		out := respond.ResponseMessage{
			Status: respond.StatusResponse{
				Message: "Report with the same name already exists",
				Code:    strconv.Itoa(http.StatusConflict),
			}}

		output, _ = respond.MarshalContent(out, contentType, "", " ")

		code = http.StatusConflict
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err

	}
//.........这里部分代码省略.........

// Delete function used to implement remove report request
func Delete(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	//Extracting record id from url
	id := mux.Vars(r)["id"]

	// Try to open the mongo session
	session, err := mongo.OpenSession(tenantDbConfig)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// We search by name and delete the document in db
	query := bson.M{"id": id}
	info, err := mongo.Remove(session, tenantDbConfig.Db, reportsColl, query)

	if err != nil {
		if err.Error() != "not found" {
			code = http.StatusInternalServerError
			return code, h, output, err
		}
		//Render the response into XML
		code = http.StatusNotFound
		output, err = ReportNotFound(contentType)
		return code, h, output, err
	}

	// info.Removed > 0 means that many documents have been removed
	// If deletion took place we notify user accordingly.
	// Else we notify that no tenant matched the specific name
	if info.Removed > 0 {
		code = http.StatusOK
		output, err = respond.CreateResponseMessage("Report was successfully deleted", "200", contentType)
	} else {
		code = http.StatusNotFound
		output, err = ReportNotFound(contentType)
	}
	//Render the response into XML
	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	return code, h, output, err

}

// Update function used to implement update report request.
// This is an http PUT request that gets a specific report's name
// as a urlvar parameter input and a json structure in the request
// body in order to update the datastore document for the specific
// report
func Update(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "text/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output, _ = respond.MarshalContent(respond.UnauthorizedMessage, contentType, "", " ")
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		return code, h, output, err
	}

	//Extracting report name from url
	id := mux.Vars(r)["id"]

	//Reading the json input
	reqBody, err := ioutil.ReadAll(r.Body)

	input := MongoInterface{}
	//Unmarshalling the json input into byte form
	err = json.Unmarshal(reqBody, &input)

	if err != nil {

		// User provided malformed json input data
		output, _ := respond.MarshalContent(respond.MalformedJSONInput, contentType, "", " ")
		code = http.StatusBadRequest
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	sanitizedInput := bson.M{
		"$set": bson.M{
			// "info": bson.M{
			"info.name":        input.Info.Name,
			"info.description": input.Info.Description,
			"info.updated":     time.Now().Format("2006-01-02 15:04:05"),
			// },
			"profiles":        input.Profiles,
			"filter_tags":     input.Tags,
			"topology_schema": input.Topology,
		}}

	// Try to open the mongo session
	session, err := mongo.OpenSession(tenantDbConfig)
	defer session.Close()

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Validate profiles given in report
	validationErrors := input.ValidateProfiles(session.DB(tenantDbConfig.Db))

	if len(validationErrors) > 0 {
		code = 422
		out := respond.UnprocessableEntity
		out.Errors = validationErrors
		output = out.MarshalTo(contentType)
		return code, h, output, err
	}

	// We search by name and update
	query := bson.M{"id": id}
	err = mongo.Update(session, tenantDbConfig.Db, reportsColl, query, sanitizedInput)
	if err != nil {
		if err.Error() != "not found" {
			code = http.StatusInternalServerError
			return code, h, output, err
		}
		//Render the response into XML
		code = http.StatusNotFound
		output, err = ReportNotFound(contentType)
		return code, h, output, err
	}

	//Render the response into XML
	output, err = respond.CreateResponseMessage("Report was successfully updated", "200", contentType)
//.........这里部分代码省略.........

// ListMetricTimelines returns a list of metric timelines
func ListMetricTimelines(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {

	//STANDARD DECLARATIONS START

	code := http.StatusOK
	h := http.Header{}
	output := []byte("List Metric Timelines")
	err := error(nil)
	contentType := "application/xml"
	charset := "utf-8"

	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	// Parse the request into the input
	urlValues := r.URL.Query()
	vars := mux.Vars(r)

	parsedStart, parsedEnd, errs := respond.ValidateDateRange(urlValues.Get("start_time"), urlValues.Get("end_time"))
	if len(errs) > 0 {
		code = http.StatusBadRequest
		output = respond.CreateFailureResponseMessage("Bad Request", "400", errs).MarshalTo(contentType)
	}

	input := InputParams{
		parsedStart,
		parsedEnd,
		vars["report_name"],
		vars["group_type"],
		vars["group_name"],
		vars["service_name"],
		vars["endpoint_name"],
		vars["metric_name"],
		contentType,
	}

	// Call authenticateTenant to check the api key and retrieve
	// the correct tenant db conf
	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)

	if err != nil {
		output = []byte(http.StatusText(http.StatusUnauthorized))
		code = http.StatusUnauthorized //If wrong api key is passed we return UNAUTHORIZED http status
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	// Mongo Session
	results := []DataOutput{}

	session, err := mongo.OpenSession(tenantDbConfig)
	defer mongo.CloseSession(session)

	metricCollection := session.DB(tenantDbConfig.Db).C("status_metrics")

	// Query the detailed metric results
	reportID, err := mongo.GetReportID(session, tenantDbConfig.Db, input.report)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	err = metricCollection.Find(prepareQuery(input, reportID)).All(&results)
	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	output, err = createView(results, input) //Render the results into XML format

	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
	return code, h, output, err
}

// ListServiceFlavorResults is responsible for handling request to list service flavor results
func ListServiceFlavorResults(r *http.Request, cfg config.Config) (int, http.Header, []byte, error) {
	//STANDARD DECLARATIONS START
	code := http.StatusOK
	h := http.Header{}
	output := []byte("")
	err := error(nil)
	contentType := "application/xml"
	charset := "utf-8"
	//STANDARD DECLARATIONS END

	contentType, err = respond.ParseAcceptHeader(r)
	h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))

	if err != nil {
		code = http.StatusNotAcceptable
		output, _ = respond.MarshalContent(respond.NotAcceptableContentType, contentType, "", " ")
		return code, h, output, err
	}

	// Parse the request into the input
	urlValues := r.URL.Query()
	vars := mux.Vars(r)

	tenantDbConfig, err := authentication.AuthenticateTenant(r.Header, cfg)
	if err != nil {
		if err.Error() == "Unauthorized" {
			code = http.StatusUnauthorized
			out := respond.UnauthorizedMessage
			output = out.MarshalTo(contentType)
			return code, h, output, err
		}
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	session, err := mongo.OpenSession(tenantDbConfig)
	defer mongo.CloseSession(session)

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	report := reports.MongoInterface{}
	err = mongo.FindOne(session, tenantDbConfig.Db, "reports", bson.M{"info.name": vars["report_name"]}, &report)

	if err != nil {
		code = http.StatusBadRequest
		message := "The report with the name " + vars["report_name"] + " does not exist"
		output, err := createErrorMessage(message, contentType) //Render the response into XML or JSON
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	input := serviceFlavorResultQuery{
		basicQuery: basicQuery{
			Name:        vars["service_type"],
			Granularity: urlValues.Get("granularity"),
			Format:      contentType,
			StartTime:   urlValues.Get("start_time"),
			EndTime:     urlValues.Get("end_time"),
			Report:      report,
			Vars:        vars,
		},
		EndpointGroup: vars["lgroup_name"],
	}

	tenantDB := session.DB(tenantDbConfig.Db)
	errs := input.Validate(tenantDB)
	if len(errs) > 0 {
		out := respond.BadRequestSimple
		out.Errors = errs
		output = out.MarshalTo(contentType)
		code = 400
		return code, h, output, err
	}

	if vars["lgroup_type"] != report.GetEndpointGroupType() {
		code = http.StatusBadRequest
		message := "The report " + vars["report_name"] + " does not define endpoint group type: " + vars["lgroup_type"] + ". Try using " + report.GetEndpointGroupType() + " instead."
		output, err := createErrorMessage(message, contentType) //Render the response into XML or JSON
		h.Set("Content-Type", fmt.Sprintf("%s; charset=%s", contentType, charset))
		return code, h, output, err
	}

	results := []ServiceFlavorInterface{}

	if err != nil {
		code = http.StatusInternalServerError
		return code, h, output, err
	}

	// Construct the query to mongodb based on the input
	filter := bson.M{
		"date":   bson.M{"$gte": input.StartTimeInt, "$lte": input.EndTimeInt},
		"report": report.ID,
	}

	if input.Name != "" {
//.........这里部分代码省略.........