2015-01-21 11:07:45 -08:00
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// Copyright 2014 The Prometheus Authors
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2014-05-28 10:44:54 -07:00
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package web
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import (
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"flag"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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2014-06-10 07:30:06 -07:00
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"path/filepath"
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2014-05-28 10:44:54 -07:00
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clientmodel "github.com/prometheus/client_golang/model"
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2015-06-02 23:38:50 -07:00
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2015-03-30 10:43:19 -07:00
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"github.com/prometheus/prometheus/promql"
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2015-05-28 12:22:08 -07:00
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"github.com/prometheus/prometheus/template"
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"github.com/prometheus/prometheus/util/route"
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)
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var (
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2014-11-20 12:03:51 -08:00
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consoleTemplatesPath = flag.String("web.console.templates", "consoles", "Path to the console template directory, available at /console.")
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consoleLibrariesPath = flag.String("web.console.libraries", "console_libraries", "Path to the console library directory.")
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2014-05-28 10:44:54 -07:00
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)
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2014-12-10 07:16:49 -08:00
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// ConsolesHandler implements http.Handler.
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type ConsolesHandler struct {
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QueryEngine *promql.Engine
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PathPrefix string
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}
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func (h *ConsolesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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ctx := route.Context(r)
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name := route.Param(ctx, "filepath")
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file, err := http.Dir(*consoleTemplatesPath).Open(name)
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if err != nil {
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http.Error(w, err.Error(), http.StatusNotFound)
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return
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}
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text, err := ioutil.ReadAll(file)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// Provide URL parameters as a map for easy use. Advanced users may have need for
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// parameters beyond the first, so provide RawParams.
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rawParams, err := url.ParseQuery(r.URL.RawQuery)
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if err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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params := map[string]string{}
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for k, v := range rawParams {
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params[k] = v[0]
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}
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data := struct {
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RawParams url.Values
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Params map[string]string
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Path string
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}{
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RawParams: rawParams,
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Params: params,
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Path: name,
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}
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2015-06-02 23:38:50 -07:00
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tmpl := template.NewTemplateExpander(string(text), "__console_"+name, data, clientmodel.Now(), h.QueryEngine, h.PathPrefix)
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filenames, err := filepath.Glob(*consoleLibrariesPath + "/*.lib")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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2015-05-28 12:22:08 -07:00
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result, err := tmpl.ExpandHTML(filenames)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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io.WriteString(w, result)
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}
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