我正在尝试使用一个API，它会返回一个JSON，这样我就可以在函数中使用它。
进口
我正在导入Jquery、instafeed.min.js和API(instant-tokens.com(.
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
integrity="sha512-894YE6QWD5I59HgZOGReFYm4dnWc1Qt5NtvYSaNcOP+u1T9qYdvdihz0PPSiiqn/+/3e7Jo4EaG7TubfWGUrMQ=="
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/instafeed.js/1.3.2/instafeed.min.js"
integrity="sha512-CoWJ3qoyvZZrGHIctI7xjuAyhg2MCZfBZ8P7PjOBA+Xp2N/xl6YUxxmE+aV4w0056tfemwyseDhf2nXlEgAF2A=="
crossorigin="anonymous"></script>
// this one is in the head section
<script src="https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token.js?userSecret=slqh9w7letquro8mj056yi"></script>
Instafeed脚本
<script type="text/javascript">
$(document).ready(function () {
var instantTokenApiUrl = 'https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token.js?userSecret=slqh9w7letquro8mj056yi'
$.ajax({
url: instantTokenApiUrl,
dataType: 'json',
})
.done(function (response) {
if (!response.Token) {
console.log('Error :: ', response);
} else {
var feed = new Instafeed({
accessToken: response.Token
});
feed.run();
}
});
});
</script>
我正在尝试做这篇文章中的内容：https://github.com/codingbadger/instant-tokens.com/wiki/3.-Instafeed.js-Demo
但我的提要仍然没有显示，它给了我以下CORS错误：
Access to XMLHttpRequest at 'https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token.js?userSecret=slqh9w7letquro8mj056yi' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
GET https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token.js?userSecret=slqh9w7letquro8mj056yi net::ERR_FAILED
jquery.min.js:2 XHR failed loading: GET "https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token.js?userSecret=slqh9w7letquro8mj056yi".
我的问题是：有解决办法吗？我对ajax和JSON还很陌生，所以我希望人们能告诉我我做错了什么。
更新
出于某种原因，在我手动将instafeed函数添加到代码中，而不是从外部源链接它之后，它就工作了。
最后，我提出了一个ajax请求。
/* instafeed.js | v2.0.0-rc3 | https://github.com/stevenschobert/instafeed.js | License: MIT */
(function(global, factory) {
typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() : typeof define === "function" && define.amd ? define(factory) : (global = typeof globalThis !== "undefined" ? globalThis : global || self,
global.Instafeed = factory());
})(this, function() {
"use strict";
function assert(val, msg) {
if (!val) {
throw new Error(msg);
}
}
function Instafeed(options) {
assert(!options || typeof options === "object", "options must be an object, got " + options + " (" + typeof options + ")");
var opts = {
accessToken: null,
accessTokenTimeout: 1e4,
after: null,
apiTimeout: 1e4,
apiLimit: null,
before: null,
debug: false,
error: null,
filter: null,
limit: null,
mock: false,
render: null,
sort: null,
success: null,
target: "instafeed",
template: '<a href="{{link}}"><img title="{{caption}}" src="{{image}}" /></a>',
templateBoundaries: ["{{", "}}"],
transform: null
};
var state = {
running: false,
node: null,
token: null,
paging: null,
pool: []
};
if (options) {
for (var optKey in opts) {
if (typeof options[optKey] !== "undefined") {
opts[optKey] = options[optKey];
}
}
}
assert(typeof opts.target === "string" || typeof opts.target === "object", "target must be a string or DOM node, got " + opts.target + " (" + typeof opts.target + ")");
assert(typeof opts.accessToken === "string" || typeof opts.accessToken === "function", "accessToken must be a string or function, got " + opts.accessToken + " (" + typeof opts.accessToken + ")");
assert(typeof opts.accessTokenTimeout === "number", "accessTokenTimeout must be a number, got " + opts.accessTokenTimeout + " (" + typeof opts.accessTokenTimeout + ")");
assert(typeof opts.apiTimeout === "number", "apiTimeout must be a number, got " + opts.apiTimeout + " (" + typeof opts.apiTimeout + ")");
assert(typeof opts.debug === "boolean", "debug must be true or false, got " + opts.debug + " (" + typeof opts.debug + ")");
assert(typeof opts.mock === "boolean", "mock must be true or false, got " + opts.mock + " (" + typeof opts.mock + ")");
assert(typeof opts.templateBoundaries === "object" && opts.templateBoundaries.length === 2 && typeof opts.templateBoundaries[0] === "string" && typeof opts.templateBoundaries[1] === "string", "templateBoundaries must be an array of 2 strings, got " + opts.templateBoundaries + " (" + typeof opts.templateBoundaries + ")");
assert(!opts.template || typeof opts.template === "string", "template must null or string, got " + opts.template + " (" + typeof opts.template + ")");
assert(!opts.error || typeof opts.error === "function", "error must be null or function, got " + opts.error + " (" + typeof opts.error + ")");
assert(!opts.before || typeof opts.before === "function", "before must be null or function, got " + opts.before + " (" + typeof opts.before + ")");
assert(!opts.after || typeof opts.after === "function", "after must be null or function, got " + opts.after + " (" + typeof opts.after + ")");
assert(!opts.success || typeof opts.success === "function", "success must be null or function, got " + opts.success + " (" + typeof opts.success + ")");
assert(!opts.filter || typeof opts.filter === "function", "filter must be null or function, got " + opts.filter + " (" + typeof opts.filter + ")");
assert(!opts.transform || typeof opts.transform === "function", "transform must be null or function, got " + opts.transform + " (" + typeof opts.transform + ")");
assert(!opts.sort || typeof opts.sort === "function", "sort must be null or function, got " + opts.sort + " (" + typeof opts.sort + ")");
assert(!opts.render || typeof opts.render === "function", "render must be null or function, got " + opts.render + " (" + typeof opts.render + ")");
assert(!opts.limit || typeof opts.limit === "number", "limit must be null or number, got " + opts.limit + " (" + typeof opts.limit + ")");
assert(!opts.apiLimit || typeof opts.apiLimit === "number", "apiLimit must null or number, got " + opts.apiLimit + " (" + typeof opts.apiLimit + ")");
this._state = state;
this._options = opts;
}
Instafeed.prototype.run = function run() {
var scope = this;
this._debug("run", "options", this._options);
this._debug("run", "state", this._state);
if (this._state.running) {
this._debug("run", "already running, skipping");
return false;
}
this._start();
this._debug("run", "getting dom node");
if (typeof this._options.target === "string") {
this._state.node = document.getElementById(this._options.target);
} else {
this._state.node = this._options.target;
}
if (!this._state.node) {
this._fail(new Error("no element found with ID " + this._options.target));
return false;
}
this._debug("run", "got dom node", this._state.node);
this._debug("run", "getting access token");
this._getAccessToken(function onTokenReceived(err, token) {
if (err) {
scope._debug("onTokenReceived", "error", err);
scope._fail(new Error("error getting access token: " + err.message));
return;
}
scope._debug("onTokenReceived", "got token", token);
scope._state.token = token;
scope._showNext(function onNextShown(err) {
if (err) {
scope._debug("onNextShown", "error", err);
scope._fail(err);
return;
}
scope._finish();
});
});
return true;
};
Instafeed.prototype.hasNext = function hasNext() {
var paging = this._state.paging;
var pool = this._state.pool;
this._debug("hasNext", "paging", paging);
this._debug("hasNext", "pool", pool.length, pool);
return pool.length > 0 || paging && typeof paging.next === "string";
};
Instafeed.prototype.next = function next() {
var scope = this;
if (!scope.hasNext()) {
scope._debug("next", "hasNext is false, skipping");
return false;
}
if (scope._state.running) {
scope._debug("next", "already running, skipping");
return false;
}
scope._start();
scope._showNext(function onNextShown(err) {
if (err) {
scope._debug("onNextShown", "error", err);
scope._fail(err);
return;
}
scope._finish();
});
};
Instafeed.prototype._showNext = function showNext(callback) {
var scope = this;
var url = null;
var poolItems = null;
var hasLimit = typeof this._options.limit === "number";
scope._debug("showNext", "pool", scope._state.pool.length, scope._state.pool);
if (scope._state.pool.length > 0) {
if (hasLimit) {
poolItems = scope._state.pool.splice(0, scope._options.limit);
} else {
poolItems = scope._state.pool.splice(0);
}
scope._debug("showNext", "items from pool", poolItems.length, poolItems);
scope._debug("showNext", "updated pool", scope._state.pool.length, scope._state.pool);
if (scope._options.mock) {
scope._debug("showNext", "mock enabled, skipping render");
} else {
try {
scope._renderData(poolItems);
} catch (renderErr) {
callback(renderErr);
return;
}
}
callback(null);
} else {
if (scope._state.paging && typeof scope._state.paging.next === "string") {
url = scope._state.paging.next;
} else {
url = "https://graph.instagram.com/me/media?fields=caption,id,media_type,media_url,permalink,thumbnail_url,timestamp,username&access_token=" + scope._state.token;
if (!scope._options.apiLimit && typeof scope._options.limit === "number") {
scope._debug("showNext", "no apiLimit set, falling back to limit", scope._options.apiLimit, scope._options.limit);
url = url + "&limit=" + scope._options.limit;
} else if (typeof scope._options.apiLimit === "number") {
scope._debug("showNext", "apiLimit set, overriding limit", scope._options.apiLimit, scope._options.limit);
url = url + "&limit=" + scope._options.apiLimit;
}
}
scope._debug("showNext", "making request", url);
scope._makeApiRequest(url, function onResponseReceived(err, data) {
var processed = null;
if (err) {
scope._debug("onResponseReceived", "error", err);
callback(new Error("api request error: " + err.message));
return;
}
scope._debug("onResponseReceived", "data", data);
scope._success(data);
scope._debug("onResponseReceived", "setting paging", data.paging);
scope._state.paging = data.paging;
try {
processed = scope._processData(data);
scope._debug("onResponseReceived", "processed data", processed);
if (processed.unused && processed.unused.length > 0) {
scope._debug("onResponseReceived", "saving unused to pool", processed.unused.length, processed.unused);
for (var i = 0; i < processed.unused.length; i++) {
scope._state.pool.push(processed.unused[i]);
}
}
} catch (processErr) {
callback(processErr);
return;
}
if (scope._options.mock) {
scope._debug("onResponseReceived", "mock enabled, skipping append");
} else {
try {
scope._renderData(processed.items);
} catch (renderErr) {
callback(renderErr);
return;
}
}
callback(null);
});
}
};
Instafeed.prototype._processData = function processData(data) {
var hasTransform = typeof this._options.transform === "function";
var hasFilter = typeof this._options.filter === "function";
var hasSort = typeof this._options.sort === "function";
var hasLimit = typeof this._options.limit === "number";
var transformedFiltered = [];
var limitDelta = null;
var dataItem = null;
var transformedItem = null;
var filterResult = null;
var unusedItems = null;
this._debug("processData", "hasFilter", hasFilter, "hasTransform", hasTransform, "hasSort", hasSort, "hasLimit", hasLimit);
if (typeof data !== "object" || typeof data.data !== "object" || data.data.length <= 0) {
return null;
}
for (var i = 0; i < data.data.length; i++) {
dataItem = this._getItemData(data.data[i]);
if (hasTransform) {
try {
transformedItem = this._options.transform(dataItem);
this._debug("processData", "transformed item", dataItem, transformedItem);
} catch (err) {
this._debug("processData", "error calling transform", err);
throw new Error("error in transform: " + err.message);
}
} else {
transformedItem = dataItem;
}
if (hasFilter) {
try {
filterResult = this._options.filter(transformedItem);
this._debug("processData", "filter item result", transformedItem, filterResult);
} catch (err) {
this._debug("processData", "error calling filter", err);
throw new Error("error in filter: " + err.message);
}
if (filterResult) {
transformedFiltered.push(transformedItem);
}
} else {
transformedFiltered.push(transformedItem);
}
}
if (hasSort) {
try {
transformedFiltered.sort(this._options.sort);
} catch (err) {
this._debug("processData", "error calling sort", err);
throw new Error("error in sort: " + err.message);
}
}
if (hasLimit) {
limitDelta = transformedFiltered.length - this._options.limit;
this._debug("processData", "checking limit", transformedFiltered.length, this._options.limit, limitDelta);
if (limitDelta > 0) {
unusedItems = transformedFiltered.slice(transformedFiltered.length - limitDelta);
this._debug("processData", "unusedItems", unusedItems.length, unusedItems);
transformedFiltered.splice(transformedFiltered.length - limitDelta, limitDelta);
}
}
return {
items: transformedFiltered,
unused: unusedItems
};
};
Instafeed.prototype._extractTags = function extractTags(str) {
var exp = /#([^s]+)/gi;
var badChars = /[~`!@#$%^&*()-+={}[]:;"'<>?,./|\s]+/i;
var tags = [];
var match = null;
if (typeof str === "string") {
while ((match = exp.exec(str)) !== null) {
if (badChars.test(match[1]) === false) {
tags.push(match[1]);
}
}
}
return tags;
};
Instafeed.prototype._getItemData = function getItemData(data) {
var type = null;
var image = null;
switch (data.media_type) {
case "IMAGE":
type = "image";
image = data.media_url;
break;
case "VIDEO":
type = "video";
image = data.thumbnail_url;
break;
case "CAROUSEL_ALBUM":
type = "album";
image = data.media_url;
break;
}
return {
caption: data.caption,
tags: this._extractTags(data.caption),
id: data.id,
image: image,
link: data.permalink,
model: data,
timestamp: data.timestamp,
type: type,
username: data.username
};
};
Instafeed.prototype._renderData = function renderData(items) {
var hasTemplate = typeof this._options.template === "string";
var hasRender = typeof this._options.render === "function";
var item = null;
var itemHtml = null;
var container = null;
var html = "";
this._debug("renderData", "hasTemplate", hasTemplate, "hasRender", hasRender);
if (typeof items !== "object" || items.length <= 0) {
return;
}
for (var i = 0; i < items.length; i++) {
item = items[i];
if (hasRender) {
try {
itemHtml = this._options.render(item, this._options);
this._debug("renderData", "custom render result", item, itemHtml);
} catch (err) {
this._debug("renderData", "error calling render", err);
throw new Error("error in render: " + err.message);
}
} else if (hasTemplate) {
itemHtml = this._basicRender(item);
}
if (itemHtml) {
html = html + itemHtml;
} else {
this._debug("renderData", "render item did not return any content", item);
}
}
this._debug("renderData", "html content", html);
container = document.createElement("div");
container.innerHTML = html;
this._debug("renderData", "container", container, container.childNodes.length, container.childNodes);
while (container.childNodes.length > 0) {
this._debug("renderData", "appending child", container.childNodes[0]);
this._state.node.appendChild(container.childNodes[0]);
}
};
Instafeed.prototype._basicRender = function basicRender(data) {
var exp = new RegExp(this._options.templateBoundaries[0] + "([\s\w.]+)" + this._options.templateBoundaries[1], "gm");
var template = this._options.template;
var match = null;
var output = "";
var substr = null;
var lastIndex = 0;
var keyPath = null;
var keyPathValue = null;
while ((match = exp.exec(template)) !== null) {
keyPath = match[1];
substr = template.slice(lastIndex, match.index);
output = output + substr;
keyPathValue = this._valueForKeyPath(keyPath, data);
if (keyPathValue) {
output = output + keyPathValue.toString();
}
lastIndex = exp.lastIndex;
}
if (lastIndex < template.length) {
substr = template.slice(lastIndex, template.length);
output = output + substr;
}
return output;
};
Instafeed.prototype._valueForKeyPath = function valueForKeyPath(keyPath, data) {
var exp = /([w]+)/gm;
var match = null;
var key = null;
var lastValue = data;
while ((match = exp.exec(keyPath)) !== null) {
if (typeof lastValue !== "object") {
return null;
}
key = match[1];
lastValue = lastValue[key];
}
return lastValue;
};
Instafeed.prototype._fail = function fail(err) {
var didHook = this._runHook("error", err);
if (!didHook && console && typeof console.error === "function") {
console.error(err);
}
this._state.running = false;
};
Instafeed.prototype._start = function start() {
this._state.running = true;
this._runHook("before");
};
Instafeed.prototype._finish = function finish() {
this._runHook("after");
this._state.running = false;
};
Instafeed.prototype._success = function success(data) {
this._runHook("success", data);
this._state.running = false;
};
Instafeed.prototype._makeApiRequest = function makeApiRequest(url, callback) {
var called = false;
var scope = this;
var apiRequest = null;
var callbackOnce = function callbackOnce(err, value) {
if (!called) {
called = true;
callback(err, value);
}
};
apiRequest = new XMLHttpRequest();
apiRequest.ontimeout = function apiRequestTimedOut() {
callbackOnce(new Error("api request timed out"));
};
apiRequest.onerror = function apiRequestOnError() {
callbackOnce(new Error("api connection error"));
};
apiRequest.onload = function apiRequestOnLoad(event) {
var contentType = apiRequest.getResponseHeader("Content-Type");
var responseJson = null;
scope._debug("apiRequestOnLoad", "loaded", event);
scope._debug("apiRequestOnLoad", "response status", apiRequest.status);
scope._debug("apiRequestOnLoad", "response content type", contentType);
if (contentType.indexOf("application/json") >= 0) {
try {
responseJson = JSON.parse(apiRequest.responseText);
} catch (err) {
scope._debug("apiRequestOnLoad", "json parsing error", err, apiRequest.responseText);
callbackOnce(new Error("error parsing response json"));
return;
}
}
if (apiRequest.status !== 200) {
if (responseJson && responseJson.error) {
callbackOnce(new Error(responseJson.error.code + " " + responseJson.error.message));
} else {
callbackOnce(new Error("status code " + apiRequest.status));
}
return;
}
callbackOnce(null, responseJson);
};
apiRequest.open("GET", url, true);
apiRequest.timeout = this._options.apiTimeout;
apiRequest.send();
};
Instafeed.prototype._getAccessToken = function getAccessToken(callback) {
var called = false;
var scope = this;
var timeoutCheck = null;
var callbackOnce = function callbackOnce(err, value) {
if (!called) {
called = true;
clearTimeout(timeoutCheck);
callback(err, value);
}
};
if (typeof this._options.accessToken === "function") {
this._debug("getAccessToken", "calling accessToken as function");
timeoutCheck = setTimeout(function accessTokenTimeoutCheck() {
scope._debug("getAccessToken", "timeout check", called);
callbackOnce(new Error("accessToken timed out"), null);
}, this._options.accessTokenTimeout);
try {
this._options.accessToken(function accessTokenReceiver(err, value) {
scope._debug("getAccessToken", "received accessToken callback", called, err, value);
callbackOnce(err, value);
});
} catch (err) {
this._debug("getAccessToken", "error invoking the accessToken as function", err);
callbackOnce(err, null);
}
} else {
this._debug("getAccessToken", "treating accessToken as static", typeof this._options.accessToken);
callbackOnce(null, this._options.accessToken);
}
};
Instafeed.prototype._debug = function debug() {
var args = null;
if (this._options.debug && console && typeof console.log === "function") {
args = [].slice.call(arguments);
args[0] = "[Instafeed] [" + args[0] + "]";
console.log.apply(null, args);
}
};
Instafeed.prototype._runHook = function runHook(hookName, data) {
var success = false;
if (typeof this._options[hookName] === "function") {
try {
this._options[hookName](data);
success = true;
} catch (err) {
this._debug("runHook", "error calling hook", hookName, err);
}
}
return success;
};
return Instafeed;
});
$.ajax({
type: 'get',
dataType: 'json',
url: 'https://ig.instant-tokens.com/users/133af082-bd46-416f-8d95-b6ca28a08bee/instagram/17841406882807948/token?userSecret=slqh9w7letquro8mj056yi',
success: function(response) {
var feed = new Instafeed({
target: 'instafeed',
accessToken: response.Token, // Access token from json response
});
feed.run();
},
});
谢谢你的建议，我真的很感激！