我需要使用 javascript 打印 HTML 内目录中的所有 txt 文件。 我尝试修改处理照片的代码，但没有成功
How to load all the images from one of my folder into my web page, using Jquery/Javascript
var dir = "D:\Finaltests\test1\new\places";
var fileextension = ".txt";
$.ajax({
//This will retrieve the contents of the folder if the folder is configured as 'browsable'
url: dir,
success: function (data) {
//List all .txt file names in the page
$(data).find("a:contains(" + fileextension + ")").each(function () {
var filename = this.href.replace(window.location.host, "").replace("http://", "");
$("body").append("<input type='file' onload='readText(" + dir + ")>");
});
}
});
最佳答案
您可以使用<input type="file">与 multiple属性集，accept属性设置为 text/plain ; change事件 ; FileReader , for环形。
var pre = document.querySelector("pre");
document.querySelector("input[type=file]")
.addEventListener("change", function(event) {
var files = event.target.files;
for (var i = 0; i < files.length; i++) {
(function(file) {
var reader = new FileReader();
reader.addEventListener("load", function(e) {
pre.textContent += "\n" + e.target.result;
});
reader.readAsText(file)
}(files[i]))
}
})<input type="file" accept="text/plain" multiple />
<pre>
</pre>您还可以使用webkitdirectory和allowdirs chrome、chromium 目录上传的属性；在 nightly 45+ 或 firefox 42+ 中，其中 dom.input.dirpicker首选项设置为 true , see Firefox 42 for developers , Select & Drop Files and/or Folders to be parsed 。请注意，您还可以从文件管理器中删除文件夹 <input type="file">元素
var pre = document.querySelector("pre");
document.querySelector("input[type=file]")
.addEventListener("change", function(event) {
console.log(event.target.files)
var uploadFile = function(file, path) {
// handle file uploading
console.log(file, path);
var reader = new FileReader();
reader.addEventListener("load", function(e) {
pre.textContent += "\n" + e.target.result;
});
reader.readAsText(file)
};
var iterateFilesAndDirs = function(filesAndDirs, path) {
for (var i = 0; i < filesAndDirs.length; i++) {
if (typeof filesAndDirs[i].getFilesAndDirectories === 'function') {
var path = filesAndDirs[i].path;
// this recursion enables deep traversal of directories
filesAndDirs[i].getFilesAndDirectories()
.then(function(subFilesAndDirs) {
// iterate through files and directories in sub-directory
iterateFilesAndDirs(subFilesAndDirs, path);
});
} else {
uploadFile(filesAndDirs[i], path);
}
}
};
if ("getFilesAndDirectories" in event.target) {
event.target.getFilesAndDirectories()
.then(function(filesAndDirs) {
iterateFilesAndDirs(filesAndDirs, '/');
})
} else {
// do webkit stuff
var files = event.target.files;
for (var i = 0; i < files.length; i++) {
(function(file) {
uploadFile(file)
}(files[i]))
}
}
})<!DOCTYPE html>
<html>
<head>
<script></script>
</head>
<body>
<input type="file" webkitdirectory allowdirs directory />
<pre>
</pre>
</body>
</html>plnkr http://plnkr.co/edit/Y1XYd9rLOdKRHw6tb1Sh?p=preview
<小时/>对于ajax请求 Chrome ， Chrome file:协议(protocol)本地文件系统，您可以使用 --allow-file-access-from-files 启动标志设置，请参阅 Jquery load() only working in firefox? 。
在 Firefox 中您可以设置 security.fileuri.strict_origin_policy至false ，参见 Security.fileuri.strict origin policy .
对于可能的$.ajax() chrome 的方法，您可以尝试 chromium
var path = "/path/to/drectory"; // `D:\`, `file:///`
var files = [];
$.ajax({url:path, dataType:"text html"})
.then((data) => {
// match file names from `html` returned by chrome, chromium
// for directory listing of `D:\Finaltests\test1\new\places`;
// you can alternatively load the "Index of" document and retrieve
// `.textContent` from `<a>` elements within `td` at `table` of
// rendered `html`; note, `RegExp` to match file names
// could probably be improved, does not match space characters in file names
var urls = $.unique(data.match(/\b(\w+|\d+)\.txt\b/g));
return $.when.apply($, $.map(urls, (file) => {
files.push(file);
// `\`, or `/`, depending on filesystem type
return $.ajax({url:path + "/" + file
, dataType:"text html"})
.then((data) => {
// return array of objects having property set to `file` name,
// value set to text within `file`
return {[file]:data}
})
}))
})
.then((...res) => {
console.log(res, files)
})
关于javascript - 如何使用javascript打印文件夹内的所有txt文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42632235/