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2959b53d98
* Move OpenGraph code into its own file * Move OpenGraph image proxying to app layer * Move test file code out of api4 package * MM-11272 Add OpenGraph and image dimension metadata to posts
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
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// See License.txt for license information.
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package api4
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import (
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"net/http"
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"github.com/mattermost/mattermost-server/model"
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"github.com/mattermost/mattermost-server/utils"
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)
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const OPEN_GRAPH_METADATA_CACHE_SIZE = 10000
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var openGraphDataCache = utils.NewLru(OPEN_GRAPH_METADATA_CACHE_SIZE)
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func (api *API) InitOpenGraph() {
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api.BaseRoutes.OpenGraph.Handle("", api.ApiSessionRequired(getOpenGraphMetadata)).Methods("POST")
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// Dump the image cache if the proxy settings have changed. (need switch URLs to the correct proxy)
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api.App.AddConfigListener(func(before, after *model.Config) {
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if (before.ServiceSettings.ImageProxyType != after.ServiceSettings.ImageProxyType) ||
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(before.ServiceSettings.ImageProxyURL != after.ServiceSettings.ImageProxyType) {
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openGraphDataCache.Purge()
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}
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})
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}
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func getOpenGraphMetadata(c *Context, w http.ResponseWriter, r *http.Request) {
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if !*c.App.Config().ServiceSettings.EnableLinkPreviews {
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c.Err = model.NewAppError("getOpenGraphMetadata", "api.post.link_preview_disabled.app_error", nil, "", http.StatusNotImplemented)
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return
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}
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props := model.StringInterfaceFromJson(r.Body)
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url := ""
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ok := false
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if url, ok = props["url"].(string); len(url) == 0 || !ok {
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c.SetInvalidParam("url")
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return
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}
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ogJSONGeneric, ok := openGraphDataCache.Get(url)
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if ok {
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w.Write(ogJSONGeneric.([]byte))
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return
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}
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og := c.App.GetOpenGraphMetadata(url)
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ogJSON, err := og.ToJSON()
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openGraphDataCache.AddWithExpiresInSecs(props["url"], ogJSON, 3600) // Cache would expire after 1 hour
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if err != nil {
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w.Write([]byte(`{"url": ""}`))
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return
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}
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w.Write(ogJSON)
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}
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