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InstagramSkraper.kt
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InstagramSkraper.kt
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/*
* Copyright (c) 2019-present Mikhael Sokolov
*
* 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 ru.sokomishalov.skraper.provider.instagram
import com.fasterxml.jackson.databind.JsonNode
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.flow
import ru.sokomishalov.skraper.Skraper
import ru.sokomishalov.skraper.Skrapers
import ru.sokomishalov.skraper.client.HttpRequest
import ru.sokomishalov.skraper.client.SkraperClient
import ru.sokomishalov.skraper.client.fetchJson
import ru.sokomishalov.skraper.client.fetchOpenGraphMedia
import ru.sokomishalov.skraper.internal.iterable.emitBatch
import ru.sokomishalov.skraper.internal.net.host
import ru.sokomishalov.skraper.internal.number.div
import ru.sokomishalov.skraper.internal.serialization.*
import ru.sokomishalov.skraper.model.*
import java.time.Instant
/**
* @author sokomishalov
*/
open class InstagramSkraper @JvmOverloads constructor(
override val client: SkraperClient = Skrapers.client
) : Skraper {
override fun getPosts(path: String): Flow<Post> = flow {
val nodes = fetchJsonNodes(path)
val postNodes = when {
path.isTagPath() -> nodes?.getByPath("data.hashtag.edge_hashtag_to_media.edges")
else -> nodes?.getByPath("data.user.edge_owner_to_timeline_media.edges")
}
val rawPosts = postNodes?.map { it["node"] }.orEmpty()
emitBatch(rawPosts) {
Post(
id = getString("id").orEmpty(),
text = getString("edge_media_to_caption.edges.0.node.text").orEmpty(),
publishedAt = getLong("taken_at_timestamp")?.let { Instant.ofEpochSecond(it) },
statistics = PostStatistics(
likes = getInt("edge_media_preview_like.count"),
views = getInt("video_view_count"),
comments = getInt("edge_media_to_comment.count"),
),
media = extractPostMediaItems()
)
}
}
override suspend fun getPageInfo(path: String): PageInfo? {
val nodes = fetchJsonNodes(path)
val infoNodes = when {
path.isTagPath() -> nodes?.getByPath("data.hashtag")
else -> nodes?.getByPath("data.user")
}
return infoNodes?.run {
PageInfo(
nick = getFirstByPath("username", "name")?.asText(),
name = getString("full_name"),
statistics = PageStatistics(
posts = getFirstByPath("edge_hashtag_to_media.count", "edge_owner_to_timeline_media.count")?.asInt(),
followers = getInt("edge_followed_by.count"),
following = getInt("edge_follow.count"),
),
description = getString("biography"),
avatar = getFirstByPath("profile_pic_url_hd", "profile_pic_url")?.asText()?.toImage(),
)
}
}
override fun supports(url: String): Boolean {
return "instagram.com" in url.host
}
override suspend fun resolve(media: Media): Media {
return client.fetchOpenGraphMedia(media)
}
private fun String.isTagPath() = "explore/tags/" in this
private fun JsonNode.extractPostMediaItems(): List<Media> {
val isVideo = this["is_video"].asBoolean()
val aspectRatio = this["dimensions"]?.run { getDouble("width") / getDouble("height") }
val shortcodeUrl = "${BASE_URL}/p/${getString("shortcode")}"
return listOf(
when {
isVideo -> Video(
url = getString("video_url") ?: shortcodeUrl,
aspectRatio = aspectRatio,
thumbnail = get("thumbnail_resources")?.lastOrNull()?.let {
Image(
url = it.getString("src").orEmpty(),
aspectRatio = it.getDouble("config_width") / it.getDouble("config_height")
)
}
)
else -> Image(
url = getString("display_url") ?: shortcodeUrl,
aspectRatio = aspectRatio
)
}
)
}
private suspend fun fetchJsonNodes(path: String): JsonNode? {
val request = when {
path.isTagPath() -> {
val tag = path.substringAfter("/explore/tags/").substringBefore("/")
HttpRequest(
url = INFO_BASE_URL.buildFullURL(
path = "api/v1/tags/logged_out_web_info/",
queryParams = mapOf("tag_name" to tag)
),
headers = mapOf("x-ig-app-id" to APP_ID)
)
}
else -> {
val username = path.removePrefix("/").substringBefore("/")
HttpRequest(
url = INFO_BASE_URL.buildFullURL(
path = "api/v1/users/web_profile_info/",
queryParams = mapOf("username" to username)
),
headers = mapOf("x-ig-app-id" to APP_ID)
)
}
}
return client.fetchJson(request)
}
companion object {
const val BASE_URL: String = "https://instagram.com"
const val INFO_BASE_URL: String = "https://i.instagram.com"
const val APP_ID: String = "936619743392459"
}
}