text2png for sae demo

t2p-sae.py

from bottle import *
import sae.storage as sst
from StringIO import StringIO
import sae
app = Bottle()
debug(True)
@app.get('/t2p')
def text_form():
    return '''
    <form method="POST">
    <textarea id="text" name ="text" rows="3" cols="20">
    </textarea>
    <input type="submit" name="Submit" />
    </form>
    '''
def text2png(text):
    # Configurations:
    adtexts = [u'by:syshack']
    textcolor = "#000000"
    adcolor = "#FF0000"

    # Don't touch the code below
    from PIL import Image, ImageDraw, ImageFont
    import uuid

    # Build rich text for ads
    ad = []
    for adtext in adtexts:
        ad += [(adtext.encode('gbk'), adcolor)]

    # Wrap line for text
    #   Special treated Chinese characters
    #   Workaround By Felix Yan - 20110508
    wraptext = [""]
    l = 0
    for i in text.decode('utf-8'):
        fi = i.encode('gbk')
        delta = len(fi)
        if i == '\n':
            wraptext += [""]
            l = 0
        elif l + delta > 40:
            wraptext += [fi]
            l = delta
        else:
            wraptext[-1] += fi
            l += delta

    # Format wrapped lines to rich text
    wrap = [(text, textcolor) for text in wraptext]
    wrap += ad

    # Draw picture
    i = Image.new("RGB", (330, len(wrap) * 17 + 5), "#FFFFFF")
    d = ImageDraw.Draw(i)
    f = ImageFont.truetype('ch.ttf', 16)
    for num, (text, color) in enumerate(wrap):
        d.text((2, 17 * num + 1), text.decode('gbk'), font = f, fill = color)
    io=StringIO()
    i.save(io,"PNG")
    io.seek(0)
    iStr=io.read()
    s=sst.Client()
    # Write result to a temp file
    filename = uuid.uuid4().hex + ".png"
    ob=sst.Object(iStr,expires='A3600',content_type='image/x-png')
    #Don't use content_encoding='gzip' option
    s.put('png',filename,ob)
    url = s.url('png', filename)
    return url
#----------------------------------------------------------------------
@app.post('/t2p')
def t2p():
    text = request.forms.get('text')
    link=text2png(text)
    img='<img src="'+link+'" />'
    return img
application = sae.create_wsgi_app(app)