如何将带有大量svg图表的html转换为pdf？

Question

我有一个包含大量svg图表的仪表板。我需要提供一个功能，将整个html导出为PDF格式。

我研究了一些工具，比如phantomjs和htmltocanvas等。但我无法将svg转换为pdf甚至图像。

我想，可能正在使用htmltocanvas我首先将html转换为png，然后使用phantomjs将png转换为pdf。

htmltocanvas将html页面的其余部分转换为png但不转换为svg图表。

有没有更好的方法或工具来做到这一点？

以下是将html转换为图片的代码。

html2canvas($(".content"), {
            onrendered: function(canvas) {
                var img = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream");
                window.location.href = img;

            }
        });

其中一个SVG图表如下。

<svg width="330" height="320" style="overflow: hidden;"><defs><clipPath id="c3-1462852070590-clip"><rect width="330" height="316"></rect></clipPath><clipPath id="c3-1462852070590-clip-xaxis"><rect x="-31" y="-20" width="392" height="20"></rect></clipPath><clipPath id="c3-1462852070590-clip-yaxis"><rect x="-29" y="-4" width="20" height="340"></rect></clipPath><clipPath id="c3-1462852070590-clip-grid"><rect width="330" height="316"></rect></clipPath><clipPath id="c3-1462852070590-clip-subchart"><rect width="330"></rect></clipPath></defs><g transform="translate(0.5,4.5)"><text class="c3-text c3-empty" text-anchor="middle" dominant-baseline="middle" x="165" y="158" style="opacity: 0;"></text><rect class="c3-zoom-rect" width="330" height="316" style="opacity: 0;"></rect><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip)" class="c3-regions" style="visibility: hidden;"></g><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-grid)" class="c3-grid" style="visibility: hidden;"><g class="c3-xgrid-focus"><line class="c3-xgrid-focus" x1="-10" x2="-10" y1="0" y2="316" style="visibility: hidden;"></line></g></g><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip)" class="c3-chart"><g class="c3-event-rects c3-event-rects-single" style="fill-opacity: 0;"><rect class=" c3-event-rect c3-event-rect-0" x="0" y="0" width="330" height="316"></rect></g><g class="c3-chart-bars"><g class="c3-chart-bar c3-target c3-target-FS1" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-FS1 c3-bars c3-bars-FS1" style="cursor: pointer;"></g></g><g class="c3-chart-bar c3-target c3-target-FS2" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-FS2 c3-bars c3-bars-FS2" style="cursor: pointer;"></g></g><g class="c3-chart-bar c3-target c3-target-Renewal" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-Renewal c3-bars c3-bars-Renewal" style="cursor: pointer;"></g></g><g class="c3-chart-bar c3-target c3-target-Tele-sales" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-Tele-sales c3-bars c3-bars-Tele-sales" style="cursor: pointer;"></g></g></g><g class="c3-chart-lines"><g class="c3-chart-line c3-target c3-target-FS1" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-FS1 c3-lines c3-lines-FS1"></g><g class=" c3-shapes c3-shapes-FS1 c3-areas c3-areas-FS1"></g><g class=" c3-selected-circles c3-selected-circles-FS1"></g><g class=" c3-shapes c3-shapes-FS1 c3-circles c3-circles-FS1" style="cursor: pointer;"></g></g><g class="c3-chart-line c3-target c3-target-FS2" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-FS2 c3-lines c3-lines-FS2"></g><g class=" c3-shapes c3-shapes-FS2 c3-areas c3-areas-FS2"></g><g class=" c3-selected-circles c3-selected-circles-FS2"></g><g class=" c3-shapes c3-shapes-FS2 c3-circles c3-circles-FS2" style="cursor: pointer;"></g></g><g class="c3-chart-line c3-target c3-target-Renewal" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-Renewal c3-lines c3-lines-Renewal"></g><g class=" c3-shapes c3-shapes-Renewal c3-areas c3-areas-Renewal"></g><g class=" c3-selected-circles c3-selected-circles-Renewal"></g><g class=" c3-shapes c3-shapes-Renewal c3-circles c3-circles-Renewal" style="cursor: pointer;"></g></g><g class="c3-chart-line c3-target c3-target-Tele-sales" style="opacity: 1; pointer-events: none;"><g class=" c3-shapes c3-shapes-Tele-sales c3-lines c3-lines-Tele-sales"></g><g class=" c3-shapes c3-shapes-Tele-sales c3-areas c3-areas-Tele-sales"></g><g class=" c3-selected-circles c3-selected-circles-Tele-sales"></g><g class=" c3-shapes c3-shapes-Tele-sales c3-circles c3-circles-Tele-sales" style="cursor: pointer;"></g></g></g><g class="c3-chart-arcs" transform="translate(122.984375,158)"><text class="c3-chart-arcs-title" style="text-anchor: middle; opacity: 0;"></text><g class="c3-chart-arc c3-target c3-target-FS1"><g class=" c3-shapes c3-shapes-FS1 c3-arcs c3-arcs-FS1"><path class=" c3-shape c3-shape c3-arc c3-arc-FS1" transform="" d="M7.154090006472169e-15,-116.83515625A116.83515625,116.83515625 0 1,1 -107.89143050974987,44.831829747643916L0,0Z" style="fill: rgb(31, 119, 180); cursor: pointer; opacity: 1;"></path></g><text dy=".35em" class="" transform="translate(77.74499355097029,51.88454845881587)" style="opacity: 1; text-anchor: middle; pointer-events: none;">68.7%</text></g><g class="c3-chart-arc c3-target c3-target-FS2"><g class=" c3-shapes c3-shapes-FS2 c3-arcs c3-arcs-FS2"><path class=" c3-shape c3-shape c3-arc c3-arc-FS2" transform="" d="M-44.4439868873686,-108.0517735417486A116.83515625,116.83515625 0 0,1 -11.653578222643608,-116.25251760960121L0,0Z" style="fill: rgb(255, 140, 0); cursor: pointer; opacity: 1;"></path></g><text dy=".35em" class="" transform="translate(-22.67752725334393,-90.67535579576993)" style="opacity: 1; text-anchor: middle; pointer-events: none;"></text></g><g class="c3-chart-arc c3-target c3-target-Renewal"><g class=" c3-shapes c3-shapes-Renewal c3-arcs c3-arcs-Renewal"><path class=" c3-shape c3-shape c3-arc c3-arc-Renewal" transform="" d="M-107.89143050974987,44.831829747643916A116.83515625,116.83515625 0 0,1 -44.4439868873686,-108.0517735417486L0,0Z" style="fill: rgb(0, 128, 0); cursor: pointer; opacity: 1;"></path></g><text dy=".35em" class="" transform="translate(-86.32911494813567,-35.82700522353499)" style="opacity: 1; text-anchor: middle; pointer-events: none;">25.1%</text></g><g class="c3-chart-arc c3-target c3-target-Tele-sales"><g class=" c3-shapes c3-shapes-Tele-sales c3-arcs c3-arcs-Tele-sales"><path class=" c3-shape c3-shape c3-arc c3-arc-Tele-sales" transform="" d="M-11.653578222643608,-116.25251760960121A116.83515625,116.83515625 0 0,1 8.230819442412569e-14,-116.83515625L0,0Z" style="fill: rgb(214, 39, 40); cursor: pointer; opacity: 1;"></path></g><text dy=".35em" class="" transform="translate(-4.66725363658852,-93.35152454302703)" style="opacity: 1; text-anchor: middle; pointer-events: none;"></text></g></g><g class="c3-chart-texts"><g class="c3-chart-text c3-target c3-target-FS1" style="opacity: 1; pointer-events: none;"><g class=" c3-texts c3-texts-FS1"></g></g><g class="c3-chart-text c3-target c3-target-FS2" style="opacity: 1; pointer-events: none;"><g class=" c3-texts c3-texts-FS2"></g></g><g class="c3-chart-text c3-target c3-target-Renewal" style="opacity: 1; pointer-events: none;"><g class=" c3-texts c3-texts-Renewal"></g></g><g class="c3-chart-text c3-target c3-target-Tele-sales" style="opacity: 1; pointer-events: none;"><g class=" c3-texts c3-texts-Tele-sales"></g></g></g></g><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-grid)" class="c3-grid c3-grid-lines"><g class="c3-xgrid-lines"></g><g class="c3-ygrid-lines"></g></g><g class="c3-axis c3-axis-x" clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-xaxis)" transform="translate(0,316)" style="visibility: visible; opacity: 0;"><text class="c3-axis-x-label" transform="" x="330" dx="-0.5em" dy="-0.5em" style="text-anchor: end;"></text><g class="tick" transform="translate(165, 0)" style="opacity: 1;"><line y2="6" x1="0" x2="0"></line><text y="9" x="0" transform="" style="text-anchor: middle; display: block;"><tspan x="0" dy=".71em" dx="0">0</tspan></text></g><path class="domain" d="M0,6V0H330V6"></path></g><g class="c3-axis c3-axis-y" clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-yaxis)" transform="translate(0,0)" style="visibility: visible; opacity: 0;"><text class="c3-axis-y-label" transform="rotate(-90)" x="0" dx="-0.5em" dy="1.2em" style="text-anchor: end;"></text><g class="tick" transform="translate(0,296)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">0</tspan></text></g><g class="tick" transform="translate(0,257)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">10</tspan></text></g><g class="tick" transform="translate(0,218)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">20</tspan></text></g><g class="tick" transform="translate(0,179)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">30</tspan></text></g><g class="tick" transform="translate(0,140)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">40</tspan></text></g><g class="tick" transform="translate(0,101)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">50</tspan></text></g><g class="tick" transform="translate(0,62)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">60</tspan></text></g><g class="tick" transform="translate(0,23)" style="opacity: 1;"><line x2="-6"></line><text x="-9" y="0" style="text-anchor: end;"><tspan x="-9" dy="3">70</tspan></text></g><path class="domain" d="M-6,1H0V316H-6"></path></g><g class="c3-axis c3-axis-y2" transform="translate(330,0)" style="visibility: hidden; opacity: 0;"><text class="c3-axis-y2-label" transform="rotate(-90)" x="0" dx="-0.5em" dy="-0.5em" style="text-anchor: end;"></text><g class="tick" transform="translate(0,316)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0</tspan></text></g><g class="tick" transform="translate(0,285)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.1</tspan></text></g><g class="tick" transform="translate(0,253)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.2</tspan></text></g><g class="tick" transform="translate(0,222)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.3</tspan></text></g><g class="tick" transform="translate(0,190)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.4</tspan></text></g><g class="tick" transform="translate(0,159)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.5</tspan></text></g><g class="tick" transform="translate(0,127)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.6</tspan></text></g><g class="tick" transform="translate(0,96)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.7</tspan></text></g><g class="tick" transform="translate(0,64)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.8</tspan></text></g><g class="tick" transform="translate(0,33)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">0.9</tspan></text></g><g class="tick" transform="translate(0,1)" style="opacity: 1;"><line x2="6" y2="0"></line><text x="9" y="0" style="text-anchor: start;"><tspan x="9" dy="3">1</tspan></text></g><path class="domain" d="M6,1H0V316H6"></path></g></g><g transform="translate(0.5,320.5)" style="visibility: hidden;"><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-subchart)" class="c3-chart"><g class="c3-chart-bars"></g><g class="c3-chart-lines"></g></g><g clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip)" class="c3-brush" style="pointer-events: all; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><rect class="background" x="0" width="330" style="visibility: hidden; cursor: crosshair;"></rect><rect class="extent" x="0" width="0" style="cursor: move;"></rect><g class="resize e" transform="translate(0,0)" style="cursor: ew-resize; display: none;"><rect x="-3" width="6" height="6" style="visibility: hidden;"></rect></g><g class="resize w" transform="translate(0,0)" style="cursor: ew-resize; display: none;"><rect x="-3" width="6" height="6" style="visibility: hidden;"></rect></g></g><g class="c3-axis-x" transform="translate(0,0)" clip-path="url(http://localhost:8080/charts/dashboard?operation=getUserDashBoard&amp;t=dashboardMenuOption#c3-1462852070590-clip-xaxis)" style="opacity: 0;"><g class="tick" transform="translate(165, 0)" style="opacity: 1;"><line y2="6" x1="0" x2="0"></line><text y="9" x="0" transform="" style="text-anchor: middle; display: block;"><tspan x="0" dy=".71em" dx="0">0</tspan></text></g><path class="domain" d="M0,6V0H330V6"></path></g></g><g transform="translate(258.2671875,0)"><g class=" c3-legend-item c3-legend-item-FS1" style="visibility: visible; cursor: pointer;"><text x="14" y="131" style="pointer-events: none;">FS1</text><rect class="c3-legend-item-event" x="0" y="117" width="43.296875" height="19" style="fill-opacity: 0;"></rect><rect class="c3-legend-item-tile" x="0" y="122" width="10" height="10" style="pointer-events: none; fill: rgb(31, 119, 180);"></rect></g><g class=" c3-legend-item c3-legend-item-FS2" style="visibility: visible; cursor: pointer; opacity: 1;"><text x="14" y="150" style="pointer-events: none;">FS2</text><rect class="c3-legend-item-event" x="0" y="136" width="43.296875" height="19" style="fill-opacity: 0;"></rect><rect class="c3-legend-item-tile" x="0" y="141" width="10" height="10" style="pointer-events: none; fill: darkorange;"></rect></g><g class=" c3-legend-item c3-legend-item-Renewal" style="visibility: visible; cursor: pointer; opacity: 1;"><text x="14" y="169" style="pointer-events: none;">Renewal</text><rect class="c3-legend-item-event" x="0" y="155" width="68.25" height="19" style="fill-opacity: 0;"></rect><rect class="c3-legend-item-tile" x="0" y="160" width="10" height="10" style="pointer-events: none; fill: green;"></rect></g><g class=" c3-legend-item c3-legend-item-Tele-sales" style="visibility: visible; cursor: pointer; opacity: 1;"><text x="14" y="188" style="pointer-events: none;">Tele sales</text><rect class="c3-legend-item-event" x="0" y="174" width="74.03125" height="19" style="fill-opacity: 0;"></rect><rect class="c3-legend-item-tile" x="0" y="179" width="10" height="10" style="pointer-events: none; fill: rgb(214, 39, 40);"></rect></g></g></svg>

单个html页面上还有更多此类图表。

Answer 1

这是适用于您提供的SVG的PhantomJS代码（版本2.1.1）。

var link = "http://example.com/svg.html";
var page = require('webpage').create();
var system = require('system');

page.settings.userAgent = 'Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0';
page.viewportSize = { width: 1280, height: 720 };

page.onError = function(msg, trace) {

  var msgStack = ['ERROR: ' + msg];

  if (trace && trace.length) {
    msgStack.push('TRACE:');
    trace.forEach(function(t) {
      msgStack.push(' -> ' + t.file + ': ' + t.line + (t.function ? ' (in function "' + t.function +'")' : ''));
    });
  }

  console.error(msgStack.join('\n'));

};

page.onConsoleMessage = function(msg, lineNum, sourceId) {
    console.log('CONSOLE: ' + msg + ' (from line #' + lineNum + ' in "' + sourceId + '")');
};

page.open(link, function(status) {

    console.log(status);

    // Give it time to load
    setTimeout(function(){ 
        page.render("svg.png");
        page.render("svg.pdf");
        phantom.exit(); 
    }, 3000);

});