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hookFetch

only hookFetch

נכון ליום 06-05-2023. ראה הגרסה האחרונה.

אין להתקין סקריפט זה ישירות. זוהי ספריה עבור סקריפטים אחרים // @require https://update.greasyfork.org/scripts/465483/1186345/hookFetch.js 

(() => {
    var contextWindow = window.unsafeWindow || document.defaultView || window;
    if (contextWindow['__hookRequest__'] != null) {
        return;
    }
    var globalVariable = new Map();
    var FetchMapList = new Map();
    var XhrMapList = new Map();

    function deliveryTask(callbackList, _object, period) {
        let newObject = _object;
        for (let i = 0; i < callbackList.length; i++) {
            let tempObject = null;
            try {
                tempObject = callbackList[i](newObject, period);
            } catch (e) {
                new Error(e);
            }
            if (tempObject == null) {
                continue;
            }
            newObject = tempObject;
        }
        return newObject;
    }

    function hookFetch() {
        const originalFetch = contextWindow.fetch;
        globalVariable.set('Fetch', originalFetch);
        contextWindow.fetch = (...args) => {
            let U = args[0];
            if (U.indexOf('http') == -1) {
                if (U[0] !== '/') {
                    let pathname = new URL(location.href).pathname;
                    U = pathname + U;
                }
                U = location.origin + U;
            }
            let apply = null;
            (() => {
                let url = new URL(U),
                    pathname = url.pathname,
                    callback = FetchMapList.get(pathname);
                if (callback == null) return;
                if (callback.length === 0) return;
                let newObject = deliveryTask(callback, { args }, 'preRequest');
                if (newObject && newObject.args) {
                    args = newObject.args;
                }
                apply = originalFetch.apply(this, args);
                apply.then((response) => {
                    let originalGetReader = response.body.getReader;
                    response.body.getReader = function () {
                        let originalReader = originalGetReader.apply(this, arguments);
                        let originalRead = originalReader.read;
                        originalReader.read = function () {
                            return originalRead.apply(this, arguments).then(function (result) {
                                let tempObject = deliveryTask(callback, { result, args }, 'doing');
                                if (tempObject && tempObject.result) {
                                    result = tempObject.result;
                                }
                                return result;
                            });
                        };
                        return originalReader;
                    };
                    let text = response.text,
                        json = response.json;
                    response.text = () => {
                        return text.apply(response).then((text) => {
                            let _object = deliveryTask(callback, { text, args }, 'done');
                            if (_object && _object.text) {
                                text = _object.text;
                            }
                            return text;
                        });
                    };
                    response.json = () => {
                        return json.apply(response).then((json) => {
                            let text = JSON.stringify(json);
                            let _object = deliveryTask(callback, { text, args }, 'done');
                            if (_object && _object.text) {
                                text = _object.text;
                                return JSON.parse(text);
                            }
                            return json;
                        });
                    };
                });
            })();
            if (apply == null) {
                apply = originalFetch.apply(this, args);
            }
            return apply;
        };
    }

    function hookXhr() {
        globalVariable.set('XMLHttpRequest', contextWindow.XMLHttpRequest);
        const RealXhr = contextWindow.XMLHttpRequest;
        class NewXhr extends RealXhr {
            send() {
                globalVariable
                    .get('Fetch')(this._url, {
                        method: this._method,
                        headers: this._headers,
                        body: this._body,
                        credentials: this._withCredentials ? 'include' : 'omit'
                    })
                    .then((response) => {
                        this.status = response.status;
                        this.statusText = response.statusText;
                        this.response = response.body;
                        this.readyState = 4;
                        this.dispatchEvent(new Event('readystatechange'));
                        this.dispatchEvent(new Event('load'));
                        this.dispatchEvent(new Event('loadend'));
                    });
            }
        }
        contextWindow.XMLHttpRequest = NewXhr;
        function newXhr() {
            const xhr = new RealXhr();
            xhr._open = xhr.open;
            xhr._send = xhr.send;
            xhr.open = function (method, url, async = true) {
                this._method = method;
                this._url = url;
                this._async = async;
                this._headers = {};
                this._withCredentials = false;
                this._readyState = 0;
                this._responseType = '';
            };
            xhr.setRequestHeader = function (name, value) {
                this._headers[name] = value;
            };
            xhr.send = function (body) {
                this._body = body;
                this._send();
            };

            return xhr;
        }
        return newXhr;
    }

    (async () => {
        hookXhr();
    })();

    (async () => {
        hookFetch();
    })();

    contextWindow['__hookRequest__'] = {
        FetchCallback: {
            add: (pathname, callback) => {
                let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
                list.push(callback);
                let index = list.length;
                return index;
            },
            del: (pathname, index) => {
                try {
                    let list = FetchMapList.get(pathname);
                    if (list == null) return false;
                    list.splice(index - 1, 1);
                } catch (e) {
                    new Error(e);
                    return false;
                }
                return true;
            }
        },
        XhrCallback: {
            add: (pathname, callback) => {
                let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
                list.push(callback);
                let index = list.length;
                return index;
            },
            del: (pathname, index) => {
                try {
                    let list = XhrMapList.get(pathname);
                    if (list == null) return false;
                    list.splice(index - 1, 1);
                } catch (e) {
                    new Error(e);
                    return false;
                }
                return true;
            }
        },
        globalVariable: {
            get: (key) => {
                return globalVariable.get(key);
            },
            getAll: () => {
                return globalVariable.entries();
            },
            set: (key, value) => {
                globalVariable.set(key, value);
            },
            getOrDrfault: (key, defaultValue) => {
                return globalVariable.get(key) || defaultValue;
            }
        }
    };
})();