如何使用Reportlab将生成的PDF保存到App Engine Python中的数据存储区

时间:2012-03-03 23:16:34

标签: python google-app-engine pdf google-cloud-datastore reportlab

我有一个使用Reportlab库生成PDF文件的方法:

def obtenerPDFNuevoPedido(self, handler,rsUsuarioPedido, rsPedido):
    handler.response.headers['Content-Type'] = 'application/pdf'
    handler.response.headers['Content-Disposition'] = 'attachment; filename=output.pdf'
    story = []
    story.append(Paragraph('CHIPAS', ParagraphStyle(name="centeredStyle", alignment=TA_CENTER, fontSize=20)))
    story.append(Paragraph('____________ENLANUBE', ParagraphStyle(name="centeredStyle", alignment=TA_CENTER, fontSize=20)))
    story.append(Spacer(6, 22))
    story.append(Table([[Paragraph(str(strftime("%Y-%m-%d", gmtime())), ParagraphStyle(name="centeredStyle", alignment=TA_LEFT, fontSize=7)), 
    Paragraph(str(strftime("%H:%M:%S", gmtime())), ParagraphStyle(name="centeredStyle", alignment=TA_RIGHT, fontSize=7))]],colWidths=[5.05 * cm, 3.1 * cm]))
    story.append(Paragraph("DEVELOPED AT ROSHKA-LABS", ParagraphStyle(name="centeredStyle", alignment=TA_CENTER, fontSize=6)))
    story.append(Paragraph('-'*50, styleCentered))
    #...
    #...
    doc = SimpleDocTemplate(handler.response.out, pagesize=letter)
    doc.build(story) 

当我调用该方法时,它会打开一个保存对话框,我可以在其中指定文件的保存位置。

我如何将生成的pdf文件保存在数据存储区中?

提前致谢!

1 个答案:

答案 0 :(得分:8)

1)您只能指定所需的文件名(不是目的地)

2)试试这个(未经测试)

#define your database structure
from google.appengine.ext import db

class PdfStorage(db.Model): 
   timeAdded = db.DateTimeProperty(auto_now_add=True)
   pdfContent = db.BlobProperty()

替换

doc = SimpleDocTemplate(handler.response.out, pagesize=letter)
doc.build(story) 

pdf = StringIO()


doc = SimpleDocTemplate(pdf, pagesize=letter)
doc.build(story) 

#get content of generated pdf
content = pdf.getvalue()

#save to db
pdfStorage = PdfStorage(pdfContent = content);
pdfStorage.put()

#output to browser 
handler.response.write(content)