Instagram Unofficial API for Web

instagram.js

var DEFAULT_INSTAAPI_RESPONSE_DICT = {
    "notexist": "Could not find requested member or post",
    "unknown": "Unknown error occured"
};

var INSTAAPI_VER = "0.1.0";

var InstaApi = function (initCallBack, responseDict) {
    if (!responseDict) responseDict = DEFAULT_INSTAAPI_RESPONSE_DICT;

    this.responseDict = responseDict;
    this.version_ = INSTAAPI_VER;
    this.request_ = function (requestJson, callBack) {
        var ajaxConfigure = {
            method: requestJson.method,
            url: "https://www.instagram.com/" + requestJson.endPoint,
            complete: function (result) {
                callBack(result.status, result.responseText);
            }
        };

        if (requestJson.method === "POST") {
            if (requestJson.isJson) {
                ajaxConfigure['contentType'] = "application/json; charset=UTF-8";
                ajaxConfigure['dataType'] = "json";
                ajaxConfigure['data'] = requestJson.params;
            } else {
                var seperateFlag = false;
                var encodedParams = "";
                $.each(requestJson.params, function (key, value) {
                    if (seperateFlag) {
                        encodedParams += "&" + key + "=" + encodeURIComponent(value);
                    } else {
                        encodedParams = key + "=" + encodeURIComponent(value);
                        seperateFlag = true;
                    }
                });
                ajaxConfigure['data'] = encodedParams;
            }
        } else if (requestJson.method == "GET") {
            if (requestJson.params) {
                var seperateFlag = false;
                var encodedParams = "";
                $.each(requestJson.params, function (key, value) {
                    if (seperateFlag) {
                        encodedParams += "&" + key + "=" + encodeURIComponent(value);
                    } else {
                        encodedParams = "?" + key + "=" + encodeURIComponent(value);
                        seperateFlag = true;
                    }
                });
                ajaxConfigure['url'] += encodedParams;
            }
        } else {
            // Invalid Method
            callBack(false, null);
            return;
        }

        $.ajax(ajaxConfigure);
    };

    this.getUser = function (username, callBack) {
        var clonedResponseDict = this.responseDict;
        this.request_({
            method: "GET",
            endPoint: username,
            params: {'__a': '1'}
        }, function (result, data) {
            if (result === 200) {
                try {
                    data = JSON.parse(data)["user"];
                    var userInfo = {
                        id: data['id'],
                        username: data['username'],
                        dispname: data['full_name'],
                        follower: data['followed_by']['count'],
                        following: data['follows']['count'],
                        articles_count: data['media']['count'],
                        profile_img: data['profile_pic_url'],
                        is_private: data['is_private']
                    };
                    if (Object.keys(data).indexOf('profile_pic_url_hd') !== -1) userInfo["profile_img"] = data['profile_pic_url_hd'];
                    callBack(true, userInfo);
                } catch (e) {
                    callBack(false, {err: clonedResponseDict["unknown"]});
                }
            } else {
                var errorMessage = clonedResponseDict["unknown"];
                if (result === 404) errorMessage = clonedResponseDict["notexist"];
                callBack(false, {err: errorMessage})
            }
        });
    };

    this.getArticleDetail = function (shortCode, callBack) {
        var clonedResponseDict = this.responseDict;
        this.request_({
            method: "GET",
            endPoint: "p/" + shortCode,
            params: {'__a': '1'}
        }, function (result, data) {
            if (result === 200) {
                try {
                    data = JSON.parse(data)['graphql']['shortcode_media'];
                    var articleInfo = {
                        'img': data['display_url'],
                        'like': Number(data['edge_media_preview_like']['count'])
                    };
                    callBack(true, articleInfo);
                } catch (e) {
                    callBack(false, {err: clonedResponseDict["unknown"]});
                }
            } else {
                var errorMessage = clonedResponseDict["unknown"];
                if (result === 404) errorMessage = clonedResponseDict["notexist"];
                callBack(false, {err: errorMessage})
            }
        });
    };

    this.getUserFeed = function (userId, articleCount, cursor, callBack) {
        var clonedResponseDict = this.responseDict;
        var query = {
            id: userId,
            first: articleCount
        };
        if (cursor) query['after'] = cursor;
        this.request_({
            method: "GET",
            endPoint: "graphql/query/",
            params: {query_id: "17888483320059182", variables: JSON.stringify(query)}
        }, function (result, data) {
            if (result === 200) {
                try {
                    data = JSON.parse(data)['data']['user']['edge_owner_to_timeline_media'];
                    var articleList = [];
                    $.each(data['edges'], function (idx, node) {
                        var nodeData = node['node'];
                        articleList.push({
                            is_video: nodeData['is_video'],
                            url: nodeData['shortcode'],
                            img: nodeData['thumbnail_src'],
                            likes: nodeData['edge_media_preview_like']['count'],
                            id: nodeData['id']
                        });
                    });
                    callBack(true, {
                        cursor: data['page_info']['end_cursor'],
                        more: data['page_info']['has_next_page'],
                        articles: articleList
                    });
                } catch (e) {
                    callBack(false, {err: clonedResponseDict["unknown"]});
                }
            } else {
                var errorMessage = clonedResponseDict["unknown"];
                if (result === 404) errorMessage = clonedResponseDict["notexist"];
                callBack(false, {err: errorMessage})
            }
        });
    };

    this.request_({
        method: "GET",
        endPoint: ""
    }, function (result, data) {
        initCallBack(result === 200);
    })
};