django中如何生成非HTML格式的内容。

标签：django   javascript   

某些时候可能有这样的需求，在网页中点击一个链接或者一个按钮希望返回一张图片、一个pdf文档、一个csv文档等而非HTML。在diango中很容易做到这些。django中的view用来接收http request并返回web response。通常情况下，返回的内容为HTML，但其能够返回的不仅仅如此，还可以是上述图片、pdf文件等等。返回非HTML形式的内容的关键在于HttpResponse这个类，尤其是mimetype这个参数，通过将此参数设置为不同的值可以提示浏览器view返回了不同格式的内容。比如，想要返回图片内容，只需读如一张图片，然后在HttpResponse中指明图片的mimetype并将图片内容作为另一参数response给浏览器，浏览器能够自动正确的显示图片内容。

from django.http import HttpResponse

def my_image(request):
    image_data = open("/path/to/my/image.png", "rb").read()
    return HttpResponse(image_data, mimetype="image/png")

import csv
from django.http import HttpResponse

# Number of unruly passengers each year 1995 - 2005. In a real application
# this would likely come from a database or some other back-end data store.
UNRULY_PASSENGERS = [146,184,235,200,226,251,299,273,281,304,203]

def unruly_passengers_csv(request):
    # Create the HttpResponse object with the appropriate CSV header.
    response = HttpResponse(mimetype='text/csv')
    response['Content-Disposition'] = 'attachment; filename=unruly.csv'

    # Create the CSV writer using the HttpResponse as the "file."
    writer = csv.writer(response)
    writer.writerow(['Year', 'Unruly Airline Passengers'])
    for (year, num) in zip(range(1995, 2006), UNRULY_PASSENGERS):
        writer.writerow([year, num])

    return response

from reportlab.pdfgen import canvas
from django.http import HttpResponse

def hello_pdf(request):
    # Create the HttpResponse object with the appropriate PDF headers.
    response = HttpResponse(mimetype='application/pdf')
    response['Content-Disposition'] = 'attachment; filename=hello.pdf'

    # Create the PDF object, using the response object as its "file."
    p = canvas.Canvas(response)

    # Draw things on the PDF. Here's where the PDF generation happens.
    # See the ReportLab documentation for the full list of functionality.
    p.drawString(100, 100, "Hello world.")

    # Close the PDF object cleanly, and we're done.
    p.showPage()
    p.save()
    return response

from cStringIO import StringIO
from reportlab.pdfgen import canvas
from django.http import HttpResponse

def hello_pdf(request):
    # Create the HttpResponse object with the appropriate PDF headers.
    response = HttpResponse(mimetype='application/pdf')
    response['Content-Disposition'] = 'attachment; filename=hello.pdf'

    temp = StringIO()

    # Create the PDF object, using the StringIO object as its "file."
    p = canvas.Canvas(temp)

    # Draw things on the PDF. Here's where the PDF generation happens.
    # See the ReportLab documentation for the full list of functionality.
    p.drawString(100, 100, "Hello world.")

    # Close the PDF object cleanly.
    p.showPage()
    p.save()

    # Get the value of the StringIO buffer and write it to the response.
    response.write(temp.getvalue())
    return response

from django.http import HttpResponse
import xlwt
def viewXls(request):
    response = HttpResponse(mimetype='application/vnd.ms-excel')  
    response['Content-Disposition'] = 'attachment; filename=request.xls'    
    book = xlwt.Workbook(encoding='utf8')   
    sheet = book.add_sheet('untitled')
    for row, column, value in ((0,0,1),(0,1,2),(1,0,3),(1,1,4)) 
    sheet.write(int(row),int(column),value)
    book.save(response)
    return response

$.ajax({
                url:"{% url 'mycitsm.views.viewXls' %}",
                data:postData,
                type:"POST",
                success:function(result){

                },
       });
//是不可以的，而要使用如下的表单提交才可以：
var form = $("#xlsForm");
form.attr({
	action:"{% url 'mycitsm.views.returnXls' %}",
	method："POST"        
});
form.submit();

<form>

  <div><input type="text" name="a" value="1" id="a" /></div>

  <div><input type="text"  value="2" id="b" /></div>

  <div><input type="hidden" name="c" value="3" id="c" /></div>

  <div>

    <textarea name="d" rows="8" cols="40">4</textarea>

  </div>

  <div><select name="e">

    <option value="5" selected="selected">5</option>

    <option value="6">6</option>

    <option value="7">7</option>

  </select></div>

  <div>

    <input type="checkbox" name="f" value="8" id="f" />

  </div>

  <div>

    <input type="submit" name="g" value="Submit" id="g" />

  </div>

</form>

$('form').submit(function() {

  alert($(this).serialize());

  return false;

});
#可以输出
a=1&c=3&d=4&e=5

django中如何生成非HTML格式的内容。

标签：django   javascript   

原文地址：http://blog.csdn.net/zyz511919766/article/details/44243923