无法加载图像/文件pisa pdf Django python [英] Unable to load images/files pisa pdf Django python

问题描述

即使我指定了 @ font-face 来使用UTF-8字体，我也不会显示汉字。原来我不能显示图像...所以我似乎我无法获取任何嵌入到我的pdf文件。

I had a problem before where it wouldn't show Chinese characters even when I specified @font-face to use a UTF-8 font. It turns out I cannot display images as well... so I seems like I am unable to get any of the files embeded into my pdf.

这是代码我使用：

def render_to_pdf(template_src, context_dict):
    """Function to render html template into a pdf file"""
    template = get_template(template_src)
    context = Context(context_dict)
    html  = template.render(context)
    result = StringIO.StringIO()

    pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")),
                                            dest=result,
                                            encoding='UTF-8',
                                            link_callback=fetch_resources)
    if not pdf.err:
        response = http.HttpResponse(result.getvalue(), mimetype='application/pdf')

        return response

    return HttpResponse('We had some errors<pre>%s</pre>' % escape(html))

def fetch_resources(uri, rel):
    import os.path
    from django.conf import settings
    path = os.path.join(
            settings.STATIC_ROOT,
            uri.replace(settings.STATIC_URL, ""))
    return path

html

<img src="/static/images/bc_logo_bw_pdf.png" />

和

    @font-face {
        font-family: "Wingdings";
        src: url("/static/fonts/wingdings.ttf");
    }

我看过SO上的其他任务，但没有帮助。这两个功能也没有例外。另外在 fetch_resources 函数中，返回的路径是文件的正确完整路径，即 / home /< user> / project / static / images / bc_logo_bw_pdf .png 和 /home/<user>/project/static/fonts/wingdings.ttf ，我失去了什么

I looked at the other quests on SO but it was no help. There are also no exceptions happening in the two functions. Also in fetch_resources function the path returned was the correct full path to the file i.e. /home/<user>/project/static/images/bc_logo_bw_pdf.png and /home/<user>/project/static/fonts/wingdings.ttf and I am at a loss as to what is wrong.

更新
每次我创建一个pdf，我在控制台上收到这个消息

UPDATE Everytime I create a pdf, I get this message on the console

No handlers could be found for logger "ho.pisa"

可以相关吗？

更新＃2

字体现在我做了一个愚蠢的错误...我使用的字体没有中文unicode。但我仍然无法将任何图像嵌入到pdf中，无论是jpeg，gif还是png。

The font works now I made a dumb mistake... The font I was using did not have the Chinese unicode. But I still cannot embed any images onto the pdf, be it jpeg, gif or png.

推荐答案

我终于解决了问题我正在...事实证明，如果我设置了正文的高度与css ...一旦我删除了图像正在加载的行，它不起作用...

I have finally solved the problem I was having... it turns out it doesn't work if I set the body's height with css... once I removed that line the image was loading perfectly...

这篇关于无法加载图像/文件pisa pdf Django python的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！