111 lines
2.1 KiB
Go
111 lines
2.1 KiB
Go
package linkinfo
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import (
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"net/http"
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"net/url"
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"time"
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)
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type LinkHandler struct {
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Hosts []string
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Handler func(link string) (*LinkInfo, error)
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}
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type LinkInfoApi struct {
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Client *http.Client
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UserAgent string
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Imgur *ImgurInfoApi
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Youtube *YoutubeInfoApi
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Twitter *TwitterInfoApi
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linkHandlers []*LinkHandler
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}
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type LinkInfo struct {
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Title string `json:"title"`
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Description string `json:"description"`
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ContentType string `json:"type"`
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ContentLength int64 `json:"contentLength"`
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Duration string `json:"duration,omitempty"`
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Redirects []string `json:"redirects,omitempty"`
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}
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type HttpOptions struct {
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Option
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UserAgent string
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}
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func New(opts ...Option) *LinkInfoApi {
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api := &LinkInfoApi{
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Client: &http.Client{
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Timeout: 15 * time.Second,
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},
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}
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for _, opt := range opts {
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switch o := opt.(type) {
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case *ImgurOptions:
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api.Imgur = &ImgurInfoApi{api, o}
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case *YoutubeOptions:
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api.Youtube = &YoutubeInfoApi{api, o}
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case *TwitterOptions:
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api.Twitter = &TwitterInfoApi{opts: o}
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api.Twitter.Init()
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case *HttpOptions:
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api.UserAgent = o.UserAgent
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}
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}
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api.registerDefaultHandlers()
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return api
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}
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func (i *LinkInfoApi) registerDefaultHandlers() {
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i.linkHandlers = make([]*LinkHandler, 0)
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if i.Imgur != nil {
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i.linkHandlers = append(i.linkHandlers, &LinkHandler{
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Hosts: imgurHosts,
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Handler: i.Imgur.Handler,
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})
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}
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if i.Youtube != nil {
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i.linkHandlers = append(i.linkHandlers, &LinkHandler{
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Hosts: youtubeHosts,
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Handler: i.Youtube.Handler,
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})
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}
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if i.Twitter != nil {
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i.linkHandlers = append(i.linkHandlers, &LinkHandler{
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Hosts: twitterHosts,
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Handler: i.Twitter.Handler,
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})
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}
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}
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func (i *LinkInfoApi) AddHandler(handler *LinkHandler) {
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i.linkHandlers = append(i.linkHandlers, handler)
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}
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func (i *LinkInfoApi) Retrieve(link string) (*LinkInfo, error) {
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u, err := url.Parse(link)
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if err != nil {
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return nil, err
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}
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for _, handler := range i.linkHandlers {
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for _, host := range handler.Hosts {
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if host == u.Hostname() {
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return handler.Handler(link)
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}
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}
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}
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return i.DefaultLinkHandler(link)
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}
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