fetch | 易学教程

JSON value encoded twice : how to use fetch_assoc()?

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问题 The following code returns the value twice, once encoded in JSON : <?php $req = $bdd->prepare('SELECT Date, Open, Close FROM quotes WHERE Symbol = ? AND Date > ? AND Date < ?'); $req->execute(array($_GET['id'], $_GET['datemin'], $_GET['datemax'])); $test=array(); while ($donnees = $req->fetch()) { $test[] = $donnees; } echo json_encode($test); ?> [{"Date":"2012-02-29","0":"2012-02-29","Open":"88.14","1":"88.14","Close":"87.60","2":"87.60"},{"Date":"2012-02-28","0":"2012-02-28","Open":"87.83",

Can the facebook API fetch only NEW comments?

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问题 Imagine you wanted to fetch the entries on a facebook page and its related comments to bring it into another application. That works fine using the facebook API. But if you want to track and fetch only those 'new' comments to previously already fetched posts, is it possible? 回答1: Yes, you can use FQL and query the tables directly https://developers.facebook.com/docs/reference/fql/ https://developers.facebook.com/docs/reference/fql/comment/ You will of course need to keep track of the last

How to mock several gets in fetch-mock?

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问题 I'm testing my react components and I want to mock several get operations. What I want to do is something like: test(`Created correctly`, async () => { fetchMock.get(`*`, JSON.stringify(FIRSTGETOBJ)); fetchMock.get(`*`, JSON.stringify(SECONDGETOBJ)); fetchMock.get(`*`, JSON.stringify(THIRDGETOBJ)); //... } The url for each get is the same, but the payload changes. However, using the code above I will get: Error: Adding route with same name as existing route. See `overwriteRoutes` option. How

Chrome/Firefox sending two POSTs under the hood exactly 5 seconds apart with only one call to fetch Nodejs 8.0.0 server

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问题 NOTE: This isn't the preflight OPTIONS, and it isn't the favicon or anything else like that. It's actually 2 POSTS. There is a screenshot below to show this more clearly. My specs/versions: macOS Sierra Version 10.12.3 Chrome Version 61.0.3128.0 (Official Build) dev (64-bit) Node v8.0.0 I have a server that uses setTimeout to wait 10 seconds before responding. I have a frontend that makes a single POST to the server. Using wireshark I'm able to see that the browser actually makes 2 POSTs, a

How to handle HTTP code 4xx responses in fetch api

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问题 I was wondering how we should handle 400 from backend when we use ajax function. We can make if statement in promise resolve function and check if res status is 400. Different approach is making wrapper service for fetch, and when we got 400 from server we throw exception. How to deal with that problem ? 回答1: I'd suggest a wrapper that checks response.ok which will be true if the response code is 2xx. Note this statement from the MDN page on fetch(): An accurate check for a successful fetch()

PHP mysql_stmt::fetch() gives PHP Fatal error memory exhausted

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问题 CentOS 6.4 PHP 5.3.3 MySQL 5.1.69 x86_64 mysql_stmt::fetch() When executing fetch using a prepared statement, PHP yields error: PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 4294967296 bytes). This occurs when a variable included in a SELECT statement used to create a temporary table is unset, whether or not the variable is otherwise set in the environment before the stored procedure is called. The variable must be set within the stored procedure. When a

What is difference between Hibernate EAGER fetch and cascade-type all

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问题 Please explain difference between hibernate Eager fetching and cascade-type all. In both configuration we can load child object associated with its parent, then what is difference between in. 回答1: Its simple :Consider two entities 1. Department and 2. Employee and they have one-to-many mappings.That is one department can have many employee cascade=CascadeType.ALL and it essentially means that any change happened on DepartmentEntity must cascade to EmployeeEntity as well. If you save an

Duang~MySQLi 扩展库来袭

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PHP-MySQL 函数库是 PHP 操作 MySQL 资料库最原始的扩展库，PHP-MySQLi 的 i 代表 Improvement ，相当于前者的增强版，也包含了相对进阶的功能，另外本身也增加了安全性，比如可以大幅度减少 SQL 注入等问题的发生。开启扩展 mysqli 扩展默认并不会开启，为此我们需要找到 php.ini 文件，并且需要确认删除了 [PHP_MYSQLI] 部分中的 extension=php_mysqli.dll 行首的注释符号 ;（分号）。检验是否开启成功的几种方式 #1 通过 PHPInfo ()函数 phpinfo(); #2 通过extension_loaded() 函数检测 var_dump(extension_loaded('mysqli')); #3 通过 (function_exists(）检测函数是否存在 var_dump(function_exists('mysqli_connect')); #4 通过get_loaded_extensions() 函数得到当前已经开启的扩展 print_r(get_loaded_extensions()); 连接数据库连接并选择 mysql 数据库的几种方式： #1 建立到MySQL数据的连接并选择数据库 $mysqli=new mysqli('localhost','root','root')

Fetch Post issues with CORS not getting header

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问题 This CORS has brought me to my knees again. I mean it can be so discouraging. Please understand I have been looking at all 5 million posts on this topic before you down vote me. I realize there is a lot out there on this subject. Here is my Fetch Post in my React UI code. This is running on a IIS server with the compiled JS, and just Index.html for the SPA. Im trying to call a API on the same server different port. It's the preflight that is killing me in Chrome and other modern browsers

Fetch get request returns empty headers

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问题 Headers was indeed sent via http: However, fetch returned empty headers: 回答1: It turns out that I need to set Access-Control-Expose-Headers to include the headers I would like to expose. 来源： https://stackoverflow.com/questions/32127369/fetch-get-request-returns-empty-headers