121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
package http
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strings"
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"github.com/influxdata/flux"
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"github.com/influxdata/flux/lang"
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"github.com/opentracing/opentracing-go"
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platform "github.com/influxdata/influxdb"
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"github.com/influxdata/influxdb/kit/tracing"
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"github.com/influxdata/influxdb/query"
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"github.com/influxdata/influxdb/query/influxql"
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)
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type SourceProxyQueryService struct {
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Addr string
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InsecureSkipVerify bool
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platform.SourceFields
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}
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func (s *SourceProxyQueryService) Query(ctx context.Context, w io.Writer, req *query.ProxyRequest) (flux.Statistics, error) {
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switch req.Request.Compiler.CompilerType() {
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case influxql.CompilerType:
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return s.queryInfluxQL(ctx, w, req)
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case lang.FluxCompilerType:
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return s.queryFlux(ctx, w, req)
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}
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return flux.Statistics{}, fmt.Errorf("compiler type not supported")
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}
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func (s *SourceProxyQueryService) queryFlux(ctx context.Context, w io.Writer, req *query.ProxyRequest) (flux.Statistics, error) {
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span, ctx := opentracing.StartSpanFromContext(ctx, "SourceProxyQueryService.queryFlux")
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defer span.Finish()
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u, err := newURL(s.Addr, "/api/v2/query")
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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var body bytes.Buffer
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if err := json.NewEncoder(&body).Encode(req); err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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hreq, err := http.NewRequest("POST", u.String(), &body)
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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hreq.Header.Set("Authorization", fmt.Sprintf("Token %s", s.Token))
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hreq.Header.Set("Content-Type", "application/json")
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hreq = hreq.WithContext(ctx)
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tracing.InjectToHTTPRequest(span, hreq)
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hc := newClient(u.Scheme, s.InsecureSkipVerify)
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resp, err := hc.Do(hreq)
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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defer resp.Body.Close()
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if err := CheckError(resp); err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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if _, err = io.Copy(w, resp.Body); err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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return flux.Statistics{}, nil
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}
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func (s *SourceProxyQueryService) queryInfluxQL(ctx context.Context, w io.Writer, req *query.ProxyRequest) (flux.Statistics, error) {
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span, ctx := opentracing.StartSpanFromContext(ctx, "SourceProxyQueryService.queryInfluxQL")
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defer span.Finish()
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compiler, ok := req.Request.Compiler.(*influxql.Compiler)
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if !ok {
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return flux.Statistics{}, tracing.LogError(span, fmt.Errorf("compiler is not of type 'influxql'"))
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}
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u, err := newURL(s.Addr, "/query")
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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body := url.Values{}
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body.Add("db", compiler.DB)
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body.Add("org", compiler.Cluster)
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body.Add("q", compiler.Query)
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body.Add("rp", compiler.RP)
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hreq, err := http.NewRequest("POST", u.String(), strings.NewReader(body.Encode()))
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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hreq.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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hreq.Header.Set("Authorization", fmt.Sprintf("Token %s", s.Token))
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hreq = hreq.WithContext(ctx)
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hc := newClient(u.Scheme, s.InsecureSkipVerify)
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resp, err := hc.Do(hreq)
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if err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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defer resp.Body.Close()
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if err := CheckError(resp); err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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if _, err = io.Copy(w, resp.Body); err != nil {
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return flux.Statistics{}, tracing.LogError(span, err)
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}
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return flux.Statistics{}, nil
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}
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