Fix parsing of JSON with a UTF8 BOM in httpjson (#3267)
(cherry picked from commit 8614445235
)
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5b791fd2e5
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@ -1,6 +1,7 @@
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package httpjson
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"net/http"
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@ -15,6 +16,10 @@ import (
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"github.com/influxdata/telegraf/plugins/parsers"
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)
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var (
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utf8BOM = []byte("\xef\xbb\xbf")
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)
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// HttpJson struct
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type HttpJson struct {
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Name string
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@ -170,7 +175,6 @@ func (h *HttpJson) gatherServer(
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serverURL string,
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) error {
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resp, responseTime, err := h.sendRequest(serverURL)
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if err != nil {
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return err
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}
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@ -266,6 +270,7 @@ func (h *HttpJson) sendRequest(serverURL string) (string, float64, error) {
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if err != nil {
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return string(body), responseTime, err
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}
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body = bytes.TrimPrefix(body, utf8BOM)
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// Process response
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if resp.StatusCode != http.StatusOK {
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@ -560,3 +560,18 @@ func TestHttpJsonArray200Tags(t *testing.T) {
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}
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}
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}
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var jsonBOM = []byte("\xef\xbb\xbf[{\"value\":17}]")
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// TestHttpJsonBOM tests that UTF-8 JSON with a BOM can be parsed
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func TestHttpJsonBOM(t *testing.T) {
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httpjson := genMockHttpJson(string(jsonBOM), 200)
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for _, service := range httpjson {
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if service.Name == "other_webapp" {
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var acc testutil.Accumulator
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err := acc.GatherError(service.Gather)
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require.NoError(t, err)
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}
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}
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}
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