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Revert using fasthttp library to net/http

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This commit is contained in:
Cameron Sparr
2017-01-11 16:01:32 +00:00
parent f5d892d7d3
commit a36fd375de
6 changed files with 102 additions and 74 deletions
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139
plugins/outputs/influxdb/client/http.go
View File

@@ -1,15 +1,15 @@
package client
import (
"bytes"
"crypto/tls"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"time"
"github.com/valyala/fasthttp"
)
var (
@@ -40,13 +40,15 @@ func NewHTTP(config HTTPConfig, defaultWP WriteParams) (Client, error) {
return nil, fmt.Errorf("config.URL scheme must be http(s), got %s", u.Scheme)
}
wu := writeURL(u, defaultWP)
return &httpClient{
writeURL: []byte(wu),
writeURL: writeURL(u, defaultWP),
config: config,
url: u,
client: &fasthttp.Client{
TLSConfig: config.TLSConfig,
client: &http.Client{
Timeout: config.Timeout,
Transport: &http.Transport{
TLSClientConfig: config.TLSConfig,
},
},
}, nil
}
@@ -58,8 +60,13 @@ type HTTPConfig struct {
// UserAgent sets the User-Agent header.
UserAgent string
// Timeout is the time to wait for a response to each HTTP request (writes
// and queries).
// Timeout specifies a time limit for requests made by this
// Client. The timeout includes connection time, any
// redirects, and reading the response body. The timer remains
// running after Get, Head, Post, or Do return and will
// interrupt reading of the Response.Body.
//
// A Timeout of zero means no timeout.
Timeout time.Duration
// Username is the basic auth username for the server.
@@ -92,24 +99,27 @@ func (r *Response) Error() error {
}
type httpClient struct {
writeURL []byte
writeURL string
config HTTPConfig
client *fasthttp.Client
client *http.Client
url *url.URL
}
func (c *httpClient) Query(command string) error {
req := c.makeRequest()
req.Header.SetRequestURI(queryURL(c.url, command))
return c.doRequest(req, fasthttp.StatusOK)
req, err := c.makeRequest(queryURL(c.url, command), bytes.NewReader([]byte("")))
if err != nil {
return err
}
return c.doRequest(req, http.StatusOK)
}
func (c *httpClient) Write(b []byte) (int, error) {
req := c.makeWriteRequest(len(b), c.writeURL)
req.SetBody(b)
req, err := c.makeWriteRequest(bytes.NewReader(b), len(b), c.writeURL)
if err != nil {
return 0, nil
}
err := c.doRequest(req, fasthttp.StatusNoContent)
err = c.doRequest(req, http.StatusNoContent)
if err == nil {
return len(b), nil
}
@@ -117,10 +127,12 @@ func (c *httpClient) Write(b []byte) (int, error) {
}
func (c *httpClient) WriteWithParams(b []byte, wp WriteParams) (int, error) {
req := c.makeWriteRequest(len(b), []byte(writeURL(c.url, wp)))
req.SetBody(b)
req, err := c.makeWriteRequest(bytes.NewReader(b), len(b), writeURL(c.url, wp))
if err != nil {
return 0, nil
}
err := c.doRequest(req, fasthttp.StatusNoContent)
err = c.doRequest(req, http.StatusNoContent)
if err == nil {
return len(b), nil
}
@@ -128,10 +140,12 @@ func (c *httpClient) WriteWithParams(b []byte, wp WriteParams) (int, error) {
}
func (c *httpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
req := c.makeWriteRequest(contentLength, c.writeURL)
req.SetBodyStream(r, contentLength)
req, err := c.makeWriteRequest(r, contentLength, c.writeURL)
if err != nil {
return 0, nil
}
err := c.doRequest(req, fasthttp.StatusNoContent)
err = c.doRequest(req, http.StatusNoContent)
if err == nil {
return contentLength, nil
}
@@ -143,10 +157,12 @@ func (c *httpClient) WriteStreamWithParams(
contentLength int,
wp WriteParams,
) (int, error) {
req := c.makeWriteRequest(contentLength, []byte(writeURL(c.url, wp)))
req.SetBodyStream(r, contentLength)
req, err := c.makeWriteRequest(r, contentLength, writeURL(c.url, wp))
if err != nil {
return 0, nil
}
err := c.doRequest(req, fasthttp.StatusNoContent)
err = c.doRequest(req, http.StatusNoContent)
if err == nil {
return contentLength, nil
}
@@ -154,24 +170,27 @@ func (c *httpClient) WriteStreamWithParams(
}
func (c *httpClient) doRequest(
req *fasthttp.Request,
req *http.Request,
expectedCode int,
) error {
resp := fasthttp.AcquireResponse()
resp, err := c.client.Do(req)
if err != nil {
return err
}
err := c.client.DoTimeout(req, resp, c.config.Timeout)
code := resp.StatusCode()
code := resp.StatusCode
// If it's a "no content" response, then release and return nil
if code == fasthttp.StatusNoContent {
fasthttp.ReleaseResponse(resp)
fasthttp.ReleaseRequest(req)
if code == http.StatusNoContent {
return nil
}
// not a "no content" response, so parse the result:
var response Response
decErr := json.Unmarshal(resp.Body(), &response)
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("Fatal error reading body: %s", err)
}
decErr := json.Unmarshal(body, &response)
// If we got a JSON decode error, send that back
if decErr != nil {
@@ -184,35 +203,37 @@ func (c *httpClient) doRequest(
code, expectedCode, response.Error())
}
fasthttp.ReleaseResponse(resp)
fasthttp.ReleaseRequest(req)
return err
}
func (c *httpClient) makeWriteRequest(
body io.Reader,
contentLength int,
writeURL []byte,
) *fasthttp.Request {
req := c.makeRequest()
req.Header.SetContentLength(contentLength)
req.Header.SetRequestURIBytes(writeURL)
writeURL string,
) (*http.Request, error) {
req, err := c.makeRequest(writeURL, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Length", fmt.Sprint(contentLength))
// TODO
// if gzip {
// req.Header.SetBytesKV([]byte("Content-Encoding"), []byte("gzip"))
// req.Header.Set("Content-Encoding", "gzip")
// }
return req
return req, nil
}
func (c *httpClient) makeRequest() *fasthttp.Request {
req := fasthttp.AcquireRequest()
req.Header.SetContentTypeBytes([]byte("text/plain"))
req.Header.SetMethodBytes([]byte("POST"))
req.Header.SetUserAgent(c.config.UserAgent)
if c.config.Username != "" && c.config.Password != "" {
req.Header.Set("Authorization", "Basic "+basicAuth(c.config.Username, c.config.Password))
func (c *httpClient) makeRequest(uri string, body io.Reader) (*http.Request, error) {
req, err := http.NewRequest("POST", uri, body)
if err != nil {
return nil, err
}
return req
req.Header.Set("Content-Type", "text/plain")
req.Header.Set("User-Agent", c.config.UserAgent)
if c.config.Username != "" && c.config.Password != "" {
req.SetBasicAuth(c.config.Username, c.config.Password)
}
return req, nil
}
func (c *httpClient) Close() error {
@@ -246,13 +267,3 @@ func queryURL(u *url.URL, command string) string {
u.Path = "query"
return u.String()
}
// See 2 (end of page 4) http://www.ietf.org/rfc/rfc2617.txt
// "To receive authorization, the httpClient sends the userid and password,
// separated by a single colon (":") character, within a base64
// encoded string in the credentials."
// It is not meant to be urlencoded.
func basicAuth(username, password string) string {
auth := username + ":" + password
return base64.StdEncoding.EncodeToString([]byte(auth))
}

7
plugins/outputs/influxdb/influxdb.go
View File

@@ -99,8 +99,8 @@ func (i *InfluxDB) Connect() error {
config := client.UDPConfig{
URL: u,
PayloadSize: i.UDPPayload,
c, err := client.NewUDP(config)
}
c, err := client.NewUDP(config)
if err != nil {
return fmt.Errorf("Error creating UDP Client [%s]: %s", u, err)
}
@@ -154,8 +154,8 @@ func (i *InfluxDB) Write(metrics []telegraf.Metric) error {
bufsize := 0
for _, m := range metrics {
bufsize += m.Len()
r := metric.NewReader(metrics)
}
r := metric.NewReader(metrics)
// This will get set to nil if a successful write occurs
err := fmt.Errorf("Could not write to any InfluxDB server in cluster")
@@ -163,9 +163,6 @@ func (i *InfluxDB) Write(metrics []telegraf.Metric) error {
p := rand.Perm(len(i.clients))
for _, n := range p {
if _, e := i.clients[n].WriteStream(r, bufsize); e != nil {
// Log write failure:
log.Printf("E! InfluxDB Output Error: %s", e)
// If the database was not found, try to recreate it:
if strings.Contains(e.Error(), "database not found") {
if errc := i.clients[n].Query("CREATE DATABASE " + i.Database); errc != nil {

24
plugins/outputs/influxdb/influxdb_test.go
View File

@@ -140,3 +140,27 @@ func TestHTTPError_DatabaseNotFound(t *testing.T) {
require.Error(t, err)
require.NoError(t, i.Close())
}
// field type conflict does not return an error, instead we
func TestHTTPError_FieldTypeConflict(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
switch r.URL.Path {
case "/write":
w.WriteHeader(http.StatusNotFound)
w.Header().Set("Content-Type", "application/json")
fmt.Fprintln(w, `{"results":[{}],"error":"field type conflict: input field \"value\" on measurement \"test\" is type integer, already exists as type float dropped=1"}`)
}
}))
defer ts.Close()
i := InfluxDB{
URLs: []string{ts.URL},
Database: "test",
}
err := i.Connect()
require.NoError(t, err)
err = i.Write(testutil.MockMetrics())
require.NoError(t, err)
require.NoError(t, i.Close())
}