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extractors/instagram: use the embed page to bypass the login
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iawia002 committed May 29, 2020
1 parent dcf8152 commit aaaf800
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Showing 2 changed files with 102 additions and 100 deletions.
194 changes: 98 additions & 96 deletions extractors/instagram/instagram.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,9 @@ package instagram

import (
"encoding/json"
netURL "net/url"
"path"
"strings"

"github.com/iawia002/annie/extractors/types"
"github.com/iawia002/annie/parser"
Expand All @@ -10,23 +13,17 @@ import (
)

type instagram struct {
EntryData struct {
PostPage []struct {
Graphql struct {
ShortcodeMedia struct {
DisplayURL string `json:"display_url"`
VideoURL string `json:"video_url"`
EdgeSidecar struct {
Edges []struct {
Node struct {
DisplayURL string `json:"display_url"`
} `json:"node"`
} `json:"edges"`
} `json:"edge_sidecar_to_children"`
} `json:"shortcode_media"`
} `json:"graphql"`
} `json:"PostPage"`
} `json:"entry_data"`
ShortcodeMedia struct {
EdgeSidecar struct {
Edges []struct {
Node struct {
DisplayURL string `json:"display_url"`
IsVideo bool `json:"is_video"`
VideoURL string `json:"video_url"`
} `json:"node"`
} `json:"edges"`
} `json:"edge_sidecar_to_children"`
} `json:"shortcode_media"`
}

type extractor struct{}
Expand All @@ -36,105 +33,110 @@ func New() types.Extractor {
return &extractor{}
}

// Extract is the main function to extract the data.
func (e *extractor) Extract(url string, option types.Options) ([]*types.Data, error) {
html, err := request.Get(url, url, nil)
if err != nil {
return nil, err
}
// get the title
doc, err := parser.GetDoc(html)
func extractImageFromPage(html, url string) (map[string]*types.Stream, error) {
_, realURLs, err := parser.GetImages(html, "EmbeddedMediaImage", nil)
if err != nil {
return nil, err
}
title := parser.Title(doc)

dataStrings := utils.MatchOneOf(html, `window\._sharedData\s*=\s*(.*);`)
if dataStrings == nil || len(dataStrings) < 2 {
return nil, types.ErrURLParseFailed
urls := make([]*types.Part, 0, len(realURLs))
var totalSize int64
for _, realURL := range realURLs {
size, err := request.Size(realURL, url)
if err != nil {
return nil, err
}
urlData := &types.Part{
URL: realURL,
Size: size,
Ext: "jpg",
}
urls = append(urls, urlData)
totalSize += size
}
dataString := dataStrings[1]

return map[string]*types.Stream{
"default": {
Parts: urls,
Size: totalSize,
},
}, nil
}

func extractFromData(dataString, url string) (map[string]*types.Stream, error) {
var data instagram
if err = json.Unmarshal([]byte(dataString), &data); err != nil {
return nil, types.ErrURLParseFailed
if err := json.Unmarshal([]byte(dataString), &data); err != nil {
return nil, err
}

var (
realURL string
dataType types.DataType
size int64
)
streams := make(map[string]*types.Stream)

if data.EntryData.PostPage[0].Graphql.ShortcodeMedia.VideoURL != "" {
// Video
dataType = types.DataTypeVideo
realURL = data.EntryData.PostPage[0].Graphql.ShortcodeMedia.VideoURL
size, err = request.Size(realURL, url)
urls := make([]*types.Part, 0, len(data.ShortcodeMedia.EdgeSidecar.Edges))
var totalSize int64
for _, u := range data.ShortcodeMedia.EdgeSidecar.Edges {
// Image
realURL := u.Node.DisplayURL
ext := "jpg"
if u.Node.IsVideo {
// Video
realURL = u.Node.VideoURL
ext = "mp4"
}

size, err := request.Size(realURL, url)
if err != nil {
return nil, err
}
streams["default"] = &types.Stream{
Parts: []*types.Part{
{
URL: realURL,
Size: size,
Ext: "mp4",
},
},
urlData := &types.Part{
URL: realURL,
Size: size,
Ext: ext,
}
urls = append(urls, urlData)
totalSize += size
}

return map[string]*types.Stream{
"default": {
Parts: urls,
Size: totalSize,
},
}, nil
}

// Extract is the main function to extract the data.
func (e *extractor) Extract(url string, option types.Options) ([]*types.Data, error) {
// Instagram is forcing a login to access the page, so we use the embed page to bypass that.
u, err := netURL.Parse(url)
if err != nil {
return nil, err
}
id := u.Path[strings.LastIndex(u.Path, "/")+1:]
u.Path = path.Join(u.Path, "embed")

html, err := request.Get(u.String(), url, nil)
if err != nil {
return nil, err
}
dataStrings := utils.MatchOneOf(html, `window\.__additionalDataLoaded\('graphql',(.*)\);`)
if dataStrings == nil || len(dataStrings) < 2 {
return nil, types.ErrURLParseFailed
}
dataString := dataStrings[1]

var streams map[string]*types.Stream
if dataString == "" || dataString == "null" {
streams, err = extractImageFromPage(html, url)
} else {
// Image
dataType = types.DataTypeImage
if data.EntryData.PostPage[0].Graphql.ShortcodeMedia.EdgeSidecar.Edges == nil {
// Single
realURL = data.EntryData.PostPage[0].Graphql.ShortcodeMedia.DisplayURL
size, err = request.Size(realURL, url)
if err != nil {
return nil, err
}
streams["default"] = &types.Stream{
Parts: []*types.Part{
{
URL: realURL,
Size: size,
Ext: "jpg",
},
},
Size: size,
}
} else {
// Album
var totalSize int64
var urls []*types.Part
for _, u := range data.EntryData.PostPage[0].Graphql.ShortcodeMedia.EdgeSidecar.Edges {
realURL = u.Node.DisplayURL
size, err = request.Size(realURL, url)
if err != nil {
return nil, err
}
urlData := &types.Part{
URL: realURL,
Size: size,
Ext: "jpg",
}
urls = append(urls, urlData)
totalSize += size
}
streams["default"] = &types.Stream{
Parts: urls,
Size: totalSize,
}
}
streams, err = extractFromData(dataString, url)
}
if err != nil {
return nil, err
}

return []*types.Data{
{
Site: "Instagram instagram.com",
Title: title,
Type: dataType,
Title: "Instagram " + id,
Type: types.DataTypeImage,
Streams: streams,
URL: url,
},
Expand Down
8 changes: 4 additions & 4 deletions extractors/instagram/instagram_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -16,23 +16,23 @@ func TestDownload(t *testing.T) {
name: "video test",
args: test.Args{
URL: "https://www.instagram.com/p/BlIka1ZFCNr",
Title: "P!NK on Instagram: “AFL got us hyped! #adelaideadventures #iwanttoplay”",
Size: 2741413,
Title: "Instagram BlIka1ZFCNr",
Size: 3096378,
},
},
{
name: "image test",
args: test.Args{
URL: "https://www.instagram.com/p/Bl5oVUyl9Yx",
Title: "P!NK on Instagram: “Australia:heaven”",
Title: "Instagram Bl5oVUyl9Yx",
Size: 250596,
},
},
{
name: "image album test",
args: test.Args{
URL: "https://www.instagram.com/p/Bjyr-gxF4Rb",
Title: "P!NK on Instagram: “Nature. Nurture.\nKiddos. Gratitude”",
Title: "Instagram Bjyr-gxF4Rb",
Size: 4599909,
},
},
Expand Down

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