如何使用width
获取height
页面的pdf
和nodejs
?
是否也可以采用文件类型?
此处为angularjs
的代码:
$scope.demofun = function () {
var allowedFormats = ['jpeg', 'jpg', 'png', 'pdf'];
var unsupportedSizes = false;
if ($scope.file1[0].size < (5 * 1024 * 1024)) {
//Here I will check the file size and restrict the file if the size is not satisfy my condition.
//And I need to allow only A4 size pdf when uploading for that I want to get the dimension of pdf document
//but I don't able to get the dimension of pdf for that I write the code like this but it will wont works:
if (($scope.file1[0].width >= 21 && $scope.file1[0].width <= 22) && ($scope.file1.height >= 29.7 && $scope.file1.height <= 30.7)) {
//...
}
}
}
答案 0 :(得分:4)
有许多软件包可以提供calipers和scissors,但我发现pdf2json很简单,并且在其他模块上也不需要。以下是使用pdf2json
获取宽度和高度的方法PDFParser = require("pdf2json");
let pdfParser = new PDFParser();
pdfParser.loadPDF("./your_file_path"); // ex: ./abc.pdf
pdfParser.on("pdfParser_dataReady", pdfData => {
width = pdfData.formImage.Width / 4.5; // pdf width
height = pdfData.formImage.Pages[0].Height / 4.5; // page height
console.log(`Height : ${height} in inch`)
console.log(`Width : ${width} in inch`)
});
答案 1 :(得分:1)
请看这个, 我相信你会找到解决问题的方法。
https://www.npmjs.com/package/pdf2json#output-format-reference
此npm包将返回所有必需的详细信息。