First public commit

1 files changed, 83 insertions, 0 deletions

diff --git a/internal/handlers/templates.go b/internal/handlers/templates.go
new file mode 100644
index 0000000..df1bc58
--- /dev/null
+++ b/internal/handlers/templates.go
@@ -0,0 +1,83 @@
+// Copyright 2018 ThousandEyes Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package handlers
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/thousandeyes/shoelaces/internal/utils"
+)
+
+// TemplateHandler is the dynamic configuration provider endpoint. It
+// receives a key and maybe an environment.
+func TemplateHandler(w http.ResponseWriter, r *http.Request) {
+	variablesMap := map[string]interface{}{}
+	configName := mux.Vars(r)["key"]
+
+	if configName == "" {
+		http.Error(w, "No template name provided", http.StatusNotFound)
+		return
+	}
+
+	for key, val := range r.URL.Query() {
+		variablesMap[key] = val[0]
+	}
+
+	env := envFromRequest(r)
+	envName := envNameFromRequest(r)
+	variablesMap["baseURL"] = utils.BaseURLforEnvName(env.BaseURL, envName)
+
+	configString, err := env.Templates.RenderTemplate(env.Logger, configName, variablesMap, envName)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	} else {
+		io.WriteString(w, configString)
+	}
+}
+
+// GetTemplateParams receives a script name and returns the parameters
+// required for completing that template.
+func GetTemplateParams(w http.ResponseWriter, r *http.Request) {
+	var vars []string
+	env := envFromRequest(r)
+
+	filterBlacklist := func(s string) bool {
+		return !utils.StringInSlice(s, env.ParamsBlacklist)
+	}
+
+	script := r.URL.Query().Get("script")
+	if script == "" {
+		http.Error(w, "Required script parameter", http.StatusInternalServerError)
+		return
+	}
+
+	envName := r.URL.Query().Get("environment")
+	if envName == "" {
+		envName = "default"
+	}
+
+	vars = utils.Filter(env.Templates.ListVariables(script, envName), filterBlacklist)
+
+	marshaled, err := json.Marshal(vars)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(marshaled)
+}