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Merge pull request #3810 from raintank/apiPlugin

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ApiPlugin custom header support
This commit is contained in:
Torkel Ödegaard 2016-01-21 08:32:26 +01:00
commit f2ce8f266b
5 changed files with 104 additions and 19 deletions
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63
pkg/api/api_plugin.go
View File

@ -1,13 +1,17 @@
package api
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"net/http/httputil"
"net/url"
"text/template"
"gopkg.in/macaron.v1"
"github.com/grafana/grafana/pkg/bus"
"github.com/grafana/grafana/pkg/log"
"github.com/grafana/grafana/pkg/middleware"
m "github.com/grafana/grafana/pkg/models"
@ -34,32 +38,28 @@ func InitApiPluginRoutes(r *macaron.Macaron) {
handlers = append(handlers, middleware.RoleAuth(m.ROLE_EDITOR, m.ROLE_ADMIN))
}
}
handlers = append(handlers, ApiPlugin(route.Url))
handlers = append(handlers, ApiPlugin(route, plugin.IncludedInAppId))
r.Route(url, route.Method, handlers...)
log.Info("Plugin: Adding route %s", url)
}
}
}
func ApiPlugin(routeUrl string) macaron.Handler {
func ApiPlugin(route *plugins.ApiPluginRoute, includedInAppId string) macaron.Handler {
return func(c *middleware.Context) {
path := c.Params("*")
//Create a HTTP header with the context in it.
ctx, err := json.Marshal(c.SignedInUser)
if err != nil {
c.JsonApiErr(500, "failed to marshal context to json.", err)
return
}
targetUrl, _ := url.Parse(routeUrl)
proxy := NewApiPluginProxy(string(ctx), path, targetUrl)
proxy := NewApiPluginProxy(c, path, route, includedInAppId)
proxy.Transport = dataProxyTransport
proxy.ServeHTTP(c.Resp, c.Req.Request)
}
}
func NewApiPluginProxy(ctx string, proxyPath string, targetUrl *url.URL) *httputil.ReverseProxy {
func NewApiPluginProxy(ctx *middleware.Context, proxyPath string, route *plugins.ApiPluginRoute, includedInAppId string) *httputil.ReverseProxy {
targetUrl, _ := url.Parse(route.Url)
director := func(req *http.Request) {
req.URL.Scheme = targetUrl.Scheme
req.URL.Host = targetUrl.Host
req.Host = targetUrl.Host
@ -69,7 +69,46 @@ func NewApiPluginProxy(ctx string, proxyPath string, targetUrl *url.URL) *httput
// clear cookie headers
req.Header.Del("Cookie")
req.Header.Del("Set-Cookie")
req.Header.Add("Grafana-Context", ctx)
//Create a HTTP header with the context in it.
ctxJson, err := json.Marshal(ctx.SignedInUser)
if err != nil {
ctx.JsonApiErr(500, "failed to marshal context to json.", err)
return
}
req.Header.Add("Grafana-Context", string(ctxJson))
// add custom headers defined in the plugin config.
for _, header := range route.Headers {
var contentBuf bytes.Buffer
t, err := template.New("content").Parse(header.Content)
if err != nil {
ctx.JsonApiErr(500, fmt.Sprintf("could not parse header content template for header %s.", header.Name), err)
return
}
jsonData := make(map[string]interface{})
if includedInAppId != "" {
//lookup appSettings
query := m.GetAppSettingByAppIdQuery{OrgId: ctx.OrgId, AppId: includedInAppId}
if err := bus.Dispatch(&query); err != nil {
ctx.JsonApiErr(500, "failed to get AppSettings of includedAppId.", err)
return
}
jsonData = query.Result.JsonData
}
err = t.Execute(&contentBuf, jsonData)
if err != nil {
ctx.JsonApiErr(500, fmt.Sprintf("failed to execute header content template for header %s.", header.Name), err)
return
}
log.Debug("Adding header to proxy request. %s: %s", header.Name, contentBuf.String())
req.Header.Add(header.Name, contentBuf.String())
}
}
return &httputil.ReverseProxy{Director: director}

15
pkg/models/app_settings.go
View File

@ -1,6 +1,13 @@
package models
import "time"
import (
"errors"
"time"
)
var (
ErrAppSettingNotFound = errors.New("AppSetting not found")
)
type AppSettings struct {
Id int64
@ -33,3 +40,9 @@ type GetAppSettingsQuery struct {
OrgId int64
Result []*AppSettings
}
type GetAppSettingByAppIdQuery struct {
AppId string
OrgId int64
Result *AppSettings
}

20
pkg/plugins/api_plugin.go
View File

@ -7,12 +7,13 @@ import (
)
type ApiPluginRoute struct {
Path string `json:"path"`
Method string `json:"method"`
ReqSignedIn bool `json:"reqSignedIn"`
ReqGrafanaAdmin bool `json:"reqGrafanaAdmin"`
ReqRole models.RoleType `json:"reqRole"`
Url string `json:"url"`
Path string `json:"path"`
Method string `json:"method"`
ReqSignedIn bool `json:"reqSignedIn"`
ReqGrafanaAdmin bool `json:"reqGrafanaAdmin"`
ReqRole models.RoleType `json:"reqRole"`
Url string `json:"url"`
Headers []ApiPluginHeader `json:"headers"`
}
type ApiPlugin struct {
@ -20,11 +21,18 @@ type ApiPlugin struct {
Routes []*ApiPluginRoute `json:"routes"`
}
type ApiPluginHeader struct {
Name string `json:"name"`
Content string `json:"content"`
}
func (app *ApiPlugin) Load(decoder *json.Decoder, pluginDir string) error {
if err := decoder.Decode(&app); err != nil {
return err
}
app.PluginDir = pluginDir
ApiPlugins[app.Id] = app
return nil
}

12
pkg/plugins/app_plugin.go
View File

@ -59,6 +59,18 @@ func (app *AppPlugin) Load(decoder *json.Decoder, pluginDir string) error {
}
}
// check if we have child apiPlugins
for _, plugin := range ApiPlugins {
if strings.HasPrefix(plugin.PluginDir, app.PluginDir) {
plugin.IncludedInAppId = app.Id
app.Includes = append(app.Includes, AppIncludeInfo{
Name: plugin.Name,
Id: plugin.Id,
Type: plugin.Type,
})
}
}
Apps[app.Id] = app
return nil
}

13
pkg/services/sqlstore/app_settings.go
View File

@ -9,6 +9,7 @@ import (
func init() {
bus.AddHandler("sql", GetAppSettings)
bus.AddHandler("sql", GetAppSettingByAppId)
bus.AddHandler("sql", UpdateAppSettings)
}
@ -19,6 +20,18 @@ func GetAppSettings(query *m.GetAppSettingsQuery) error {
return sess.Find(&query.Result)
}
func GetAppSettingByAppId(query *m.GetAppSettingByAppIdQuery) error {
appSetting := m.AppSettings{OrgId: query.OrgId, AppId: query.AppId}
has, err := x.Get(&appSetting)
if err != nil {
return err
} else if has == false {
return m.ErrAppSettingNotFound
}
query.Result = &appSetting
return nil
}
func UpdateAppSettings(cmd *m.UpdateAppSettingsCmd) error {
return inTransaction2(func(sess *session) error {
var app m.AppSettings