将数据从条形码阅读器导入到Web应用程序 [英] Import data from a barcode reader to a web app
问题描述
我正在开发一个基于PHP的Web应用程序，并增加了对创建和读取条形码的支持. 我想知道如何从通过USB连接到运行Web应用程序的PC的条形码阅读器导入数据?条形码扫描仪是否以任何标准格式传输数据?
I am developing a PHP based web app and adding support to create and read barcodes. I wanted to know how can I import data from a barcode reader connected via USB to the PC running the web app? Is there any standard format in which the barcode scanners transmit data?
推荐答案
显然取决于生产者和模型.更好的具有多个模式.但是共有三种策略:
Obviously depends on producer and model. The better ones have more than a single mode. But three strategies are common:
1.)它们充当键盘，因此可以键入"所扫描的内容.这仅适用于小批量工作，并迫使您连接到系统.因此，对于Web应用程序，您需要一个简单的文本输入字段.
1.) they act as a keyboard, thus "typing" whatever is scanned. This is fine for small volume duty only and forces you to have a connection to the system. So for a web app you need a simple text input field.
2.)它们包含某种类型的内存(通常是SD插槽/卡)，用于存储扫描的代码.这使您能够以异步时间表上载"扫描的数据，例如，从商店或其他任何地方回来时. SD卡具有标准的文件系统，通常会将代码扫描到CSV文件中.因此，对于Web应用程序，您需要上传文件或必须批量运行处理代码.
2.) they contain some sort of memory (typically an SD-Slot/-Card) where they store scanned codes. This enables you to "upload" the scanned data in an asynchronus schedule, for example when coming back from a trip through the shop or whatever. The SD cards have a standard filesystem, the codes are typically scanned into CSV files. So for a web app you require a file upload or have to process the codes in a batch run.
3.)他们使用WLAN，并且可以使用诸如REST-API之类的东西来上传"他们的数据.由于反馈的问题，根据我的经验，通常无法真正使用它.对于网络应用程序，这意味着您必须添加这样的API.
3.) they use WLAN and can use things like a REST-API to "upload" their data. Usually not really usable in my experience due to problems with the feedback. For a web app this means you would have to add such an API.
哦，有趣的是:必须编写更好的代码.通常，这是通过扫描手册中无穷无尽的一系列代码来完成的.一个非常有趣"的过程:-)
Oh, and a funny thing: the better ones have to be programmed. This is usually done by scanning endless series of codes from a manual booklet. A very "interesting" process :-)
这篇关于将数据从条形码阅读器导入到Web应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
