Question

我在HMTL代码中使用了一个图像，如下所示：

＆＃13;

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Test</title>
  </head>
  <body>
    <svg height="291pt" version="1.1" viewBox="0 0 291 291" width="291pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs>  <style type="text/css">*{stroke-linecap:butt;stroke-linejoin:round;}  </style> </defs> <g id="figure_1">  <g id="patch_1">   <path d="M 0 291.4 L 291.4 291.4 L 291.4 0 L 0 0 z" style="fill:none;"></path>  </g>  <g id="axes_1">   <g id="line2d_1">    <path clip-path="url(#p6e64365aaf)" d="M 268.427273 145.7 L 207.063636 251.984936 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_2">    <path clip-path="url(#p6e64365aaf)" d="M 248.397453 148.307103 L 199.306544 233.335052 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_3">    <path clip-path="url(#p6e64365aaf)" d="M 207.063636 251.984936 L 84.336364 251.984936 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_4">    <path clip-path="url(#p6e64365aaf)" d="M 84.336364 251.984936 L 22.972727 145.7 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_5">    <path clip-path="url(#p6e64365aaf)" d="M 92.093456 233.335052 L 43.002547 148.307103 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_6">    <path clip-path="url(#p6e64365aaf)" d="M 22.972727 145.7 L 84.336364 39.415064 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_7">    <path clip-path="url(#p6e64365aaf)" d="M 84.336364 39.415064 L 207.063636 39.415064 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_8">    <path clip-path="url(#p6e64365aaf)" d="M 96.609091 55.457845 L 194.790909 55.457845 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>   <g id="line2d_9">    <path clip-path="url(#p6e64365aaf)" d="M 207.063636 39.415064 L 268.427273 145.7 " style="fill:none;stroke:#000000;stroke-linecap:square;stroke-width:1.2;"></path>   </g>  </g> </g> <defs>  <clipPath id="p6e64365aaf">   <rect height="270" width="270" x="10.7" y="10.7"></rect>  </clipPath> </defs></svg>
  </body>
</html>

＆＃13;

当我使用wkhtmltopdf将其转换为PDF时，缺少某些SVG路径。有没有人有同样的问题？解决这个问题的一些方法？

我尝试在代码中使用相对路径，完整路径，base64源和SVG（如示例中所示）。

wkhtmltopdf版本：0.12.4

Answer 1

所以不是一个确切的解决方案，但现在更好的选择是在无头模式下使用chrome

$ chrome --headless --disable-gpu --print-to-pdf test.html
[0427/011400.636954:WARNING:dns_config_service_posix.cc(174)] dns_config has unhandled options!
[0427/011400.638406:ERROR:gpu_process_transport_factory.cc(1007)] Lost UI shared context.
[0427/011400.801881:INFO:headless_shell.cc(586)] Written to file output.pdf.

此外，如果您想要更好地控制流程，可以使用NodeJS和puppeteer

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://news.ycombinator.com', {waitUntil: 'networkidle2'});
  await page.pdf({path: 'hn.pdf', format: 'A4'});

  await browser.close();
})();

Answer 2

一种解决方法是将.SVG文件转换为.PNG文件，然后再转换为.PDF。可以通过AgilityPack提取.SVG代码，也可以将文件作为字符串读取。然后使用Svg library转换为.PNG，如下所示：

var svg = SvgDocument.FromSvg<SvgDocument>(svgXmlAsString);
var bitmap = svg.Draw();
var codec = "image/png".ParseImageCodecInfo();
// intermediaryStream required due to image.Save attempting read access
using (var intermediaryStream = new MemoryStream())
{
    bitmap.Save(intermediaryStream, codec);
    intermediaryStream.Position = 0;
    await intermediaryStream.CopyToAsync(responseStream);
    await intermediaryStream.FlushAsync();
    await responseStream.FlushAsync();
}

wkhtmltopdf缺少SVG路径（渲染）

2 个答案: