85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
// Copyright 2014 The Prometheus Authors
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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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"path/filepath"
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/storage/local"
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"github.com/prometheus/prometheus/templates"
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)
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var (
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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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)
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// ConsolesHandler implements http.Handler.
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type ConsolesHandler struct {
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Storage local.Storage
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}
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func (h *ConsolesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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file, err := http.Dir(*consoleTemplatesPath).Open(r.URL.Path)
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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: r.URL.Path,
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}
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template := templates.NewTemplateExpander(string(text), "__console_"+r.URL.Path, data, clientmodel.Now(), h.Storage)
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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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result, err := template.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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