SVG 캔버스를 로컬 파일 시스템에 저장하는 방법
사용자가 브라우저를 사용하여 자바 스크립트 svg 캔버스에 벡터 그래프를 만든 후이 파일을 로컬 파일 시스템에 다운로드 할 수있는 방법이 있습니까?
SVG는 저에게 완전히 새로운 분야이므로 제 표현이 정확하지 않다면 잠시 기다려주십시오.
일반 "저장"브라우저 명령을 사용하는 것이 가능할 수도 있지만 SVG 캔버스 만 저장하는 것이 아니라 전체 페이지를 저장합니다.
가장 좋은 방법은 AJAX를 사용하고 전체 SVG XML 데이터를 POST 데이터로 서버 스크립트에 보내고 해당 스크립트가 헤더와 함께 POST 데이터를 다시 보내도록하는 것 Content-Disposition: attachment; filename=yourfile.svg입니다.
(PHP에서는를 사용하여 원시 POST 내용을 가져올 수 있습니다 file_get_contents('php://input').)
서버로의 왕복을 피할 수 있습니다.
Base64는 SVG xml을 인코딩합니다.
그런 다음 해당 데이터에 대한 링크를 생성하십시오. 사용자는를 마우스 오른쪽 버튼으로 클릭하여 로컬에 저장할 수 있습니다.
// This example was created using Protovis & jQuery
// Base64 provided by http://www.webtoolkit.info/javascript-base64.html
// Modern web browsers have a builtin function to this as well 'btoa'
function encode_as_img_and_link(){
// Add some critical information
$("svg").attr({ version: '1.1' , xmlns:"http://www.w3.org/2000/svg"});
var svg = $("#chart-canvas").html();
var b64 = Base64.encode(svg); // or use btoa if supported
// Works in recent Webkit(Chrome)
$("body").append($("<img src='data:image/svg+xml;base64,\n"+b64+"' alt='file.svg'/>"));
// Works in Firefox 3.6 and Webit and possibly any browser which supports the data-uri
$("body").append($("<a href-lang='image/svg+xml' href='data:image/svg+xml;base64,\n"+b64+"' title='file.svg'>Download</a>"));
}
img 태그는 Webkit에서 작동하고 링크는 Webkit 및 Firefox에서 작동하며 다음을 지원하는 모든 브라우저에서 작동 할 수 있습니다. data-uri
base64 인코딩을 수행 할 필요가 없습니다. 원시 SVG 코드가 포함 된 링크를 만들 수 있습니다. 다음은 The_Who의 답변에서 수정 된 encode_as_img_and_link () 함수입니다.
function img_and_link() {
$('body').append(
$('<a>')
.attr('href-lang', 'image/svg+xml')
.attr('href', 'data:image/svg+xml;utf8,' + unescape($('svg')[0].outerHTML))
.text('Download')
);
}
FileSaver.js 사용
saveAs(new Blob([SVG_DATA_HERE], {type:"application/svg+xml"}), "name.svg")
Eli Gray의 FileSaver 를 사용하면 작동합니다 (크롬).
bb = new window.WebKitBlobBuilder;
var svg = $('#designpanel').svg('get');
bb.append(svg.toSVG());
var blob = bb.getBlob("application/svg+xml;charset=" + svg.characterSet);
saveAs(blob,"name.svg");
SVG는 keith woods jquery의 svg에서 가져온 것입니다.
// save SVG
$('#SVGsave').click(function(){
var a = document.createElement('a');
a.href = 'data:image/svg+xml;utf8,' + unescape($('#SVG')[0].outerHTML);
a.download = 'plot.svg';
a.target = '_blank';
document.body.appendChild(a); a.click(); document.body.removeChild(a);
});최근에이 Chrome 플러그인 http://nytimes.github.io/svg-crowbar/를 찾았습니다 . 내 필요에 따라 약간 버그가 있지만 본질적으로 작동합니다.
I had previously made a solution similar to the accepted answer which involved a serverside script but it's quite long winded and also had the problem that all the styles had to be inline in the markup. Crowbar seems to take care of that for you, which is nice.
몇 년이 지났지 만 SVG 및 기타 관련 동작을 지원하는 웹 브라우저의 최근 수렴으로 인해 SVG에 대한 새로운 관심이 생기고 질문에 대한 '보편적 인'답변이 가능해 졌기 때문에이 주제에 대해 답변하고 있습니다. 본질적으로 zneak의 접근 방식은 정확하지만 제 생각에는 간결합니다 (즉, 저 자신을 위해 작동하는 데 시간이 걸렸습니다). 또한 AJAX에 대한 그의 참조가 불필요하거나 AJAX가 이해하는 내용이 아니라고 생각합니다 (= XMLHttpRequest 사용). 따라서 순수한 JavaScript (즉, JQuery 또는 다른 라이브러리없이)를 사용하여보다 자세한 답변을 제공하고 Java, Perl 및 PHP 용 서버 코드를 제공 할 것입니다.
(1) HTML 페이지에서 (동적으로 생성 된) SVG 콘텐츠를 고유 ID를 가진 div로 묶습니다. 예 :
<div id="svg"><svg...>SVG content</svg></div>
(2) JavaScript 함수를 호출하는 버튼을 포함합니다. 예 :
<button onclick="sendSVG();">Save as SVG File</button>
(3) 버튼 마크 업에 이름이 지정된 JavaScript 함수를 포함합니다.
function sendSVG()
{
var svgText = document.getElementById('svg').innerHTML;
var form = document.createElement("form");
form.setAttribute("method", "post");
form.setAttribute("action", "http://path-to-your-server-app");
form.setAttribute("accept-charset", "UTF-8");
var hiddenSVGField = document.createElement("input");
hiddenSVGField.setAttribute("type", "hidden");
hiddenSVGField.setAttribute("name", "svgText");
hiddenSVGField.setAttribute("value", svgText);
form.appendChild(hiddenSVGField);
document.body.appendChild(form);
form.submit();
}
(4) SVGtext 게시 요청을 수락하고 첨부 파일을 지정하기 위해 Content-Disposition을 사용하여 image / svg + xml로 반환하는 서버 앱을 작성합니다. 비록 나는 Perl 프로그래머가 아니고 화가 나서 PHP를 사용한 적이 없지만 세 가지 언어로 된 작업 코드가 제시됩니다.
자바 서블릿
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
String svgText = (String) request.getParameter("svgText");
response.setContentType("image/svg+xml");
response.addHeader("Content-Disposition", "attachment; filename=\"image.svg\"");
PrintWriter out = response.getWriter();
out.println(svgText);
}
Perl CGI
use CGI qw(:standard);
my $svgText = param('svgText');
print header(-type => "image/svg+xml",
-content_disposition => "attachment; filename=image.svg");
print $svgText;
PHP
<?php
$svgText = $_POST['svgText'];
header('Content-type: image/svg+xml');
header('Content-Disposition: attachment; filename="image.svg"');
print "$svgText";
?>
여기에 이미지에 하드 코딩 된 이름 (image.svg)을 사용했지만 실제로 페이지에서 생성 한 동적 콘텐츠의 설명자를 선택합니다 (div와 ID를 다시 사용하고 document.getElementById('graphName').textContent).
이것은 Mac Safari 9, Firefox 42, Chrome 47, Opera 34, Windows7 / IE 11 및 Windows10 / Edge에서 테스트되었으며 각 경우에 svg 파일이 다운로드되거나 다운로드하라는 메시지가 표시됩니다. 결과 파일은 예를 들어 Adobe Illustrator 또는 svg 파일을 열도록 설정 한 다른 응용 프로그램에서 열립니다.
A real-world example of this (if you consider academic research real-world) is at http://flyatlas.gla.ac.uk/MidgutAtlas/index.html in the Gene section.
Yes is it possible. Use jquery.svg http://keith-wood.name/svgRef.html and post the svg xml data using the function svg.toSVG() (writing into a hidden field on submit). Have the php save and convert to raster using imagemagick (convert image.svg image.png) then force the file to download using header("Content-Type: application/octet-stream") and readfile the image.
Most compatible way would be a round-trip to the server. You could also use a data: URI in some browsers.
You can't save anything with javascript to the local filesystem, what you should do is send the contents of the canvas to the server and make the user download and save that.
To answer my own question:
Another possibility though not the nicest is to display the serialized contents on the webpage and have the user select, copy and paste that. This after investigating eli grey's solution.
I maybe discovered a better way for not forcing the user to press right click "save image as". just live draw the canvas base64 code into the href of the link and modify it so the download will start automatically. i dont know if its universal browser compatible but it should work with the main/new browsers.
var canvas = document.getElementById('your-canvas');
if (canvas.getContext) {
var C = canvas.getContext('2d');
}
$('#your-canvas').mousedown(function(event) {
// feel free to choose your event ;)
// just for example
// var OFFSET = $(this).offset();
// var x = event.pageX - OFFSET.left;
// var y = event.pageY - OFFSET.top;
// standard data to url
var imgdata = canvas.toDataURL('image/png');
// modify the dataUrl so the browser starts downloading it instead of just showing it
var newdata = imgdata.replace(/^data:image\/png/,'data:application/octet-stream');
// give the link the values it needs
$('a.linkwithnewattr').attr('download','your_pic_name.png').attr('href',newdata);
});
feel free to wrap the a around anything you want, hope that helps a bit
$(document).ready(function(){
$("#btnDownload").click(function(){
var $container = $('#svg-container'),
// Canvg requires trimmed content
content = $container.html().trim(),
canvas = document.getElementById('svg-canvas');
// Draw svg on canvas
canvg(canvas, content);
$container.hide();
// Change img be SVG representation
var theImage = canvas.toDataURL('image/jpeg');
var a = document.createElement('a');
a.href = theImage; // xhr.response es un blob file
a.target = '_blank';
a.download = 'prueba'; // nombre del archivo.
a.style.display = 'none';
document.body.appendChild(a);
a.click();
delete a;
});//fin function
});// fin <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="http://canvg.googlecode.com/svn/trunk/rgbcolor.js"></script>
<script type="text/javascript" src="http://canvg.googlecode.com/svn/trunk/canvg.js"></script>
<input id="svgData" name="svgData" type="hidden"/>
<input id="btnDownload" type="button" value="Descargar"/>
<div id='svg-container'>
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</div>
<section>
<canvas id="svg-canvas"></canvas>
</section>I made a clean/usable bookmarklet out of the suggestions.
It will put a unique link next to every inline <svg> on the page.
https://codepen.io/corysimmons/pen/vybzqV
Hope it helps someone.
No need to do any programming at all. There are online apps people have already built for that, and include definable parameters such as dimensions, resolution, output format etc.
This is one of the better online image conversion apps I've found for svg->jpeg.http://image.online-convert.com/convert-to-jpg
참고URL : https://stackoverflow.com/questions/2483919/how-to-save-svg-canvas-to-local-filesystem
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