用django_micro搭建的，給圖片加文字水印的前端+後端功能開發；

大體功能是：輸入水印的文字，選擇要加水印的圖片，最後生成加好水印的圖片。

可在一頁中顯示多個加好水印的圖片，且可點選顯示或隱藏圖片的縮圖。實現效果如下：

程式碼如下

from django_micro import route,run,configure
from django.http import HttpRequest,HttpResponse
from dominate.document import document
import dominate.tags as dom
from wand.drawing import Drawing   # 加水印用
from wand.image import Image  # 加水印用
import base64  # 圖片轉字串用
 
 
configure({'DEBUG':True})
 
# 一些元素的cls
CENTERFRAME = "flex flex-col items-center justify-center bg-teal-200 h-screen"
UPLOAD_FORM_ATTRIS ={
  "class":"flex flex-col justify-center","ic-post-to": "/file","ic-target": "#result_item","ic-replace-target": "true","enctype": "multipart/form-data"
}
CARD1 = "flex flex-col bg-green-400 shadow-xl p-1 rounded-lg w-80 h-auto"
TEXT_INPUT = "shadow border rounded m-1 p-1 text-base text-center font-thin"
CARD2 = "flex flex-col bg-white shadow-xl p-2 rounded-lg w-80 h-80"
DASHED_BOX = "flex flex-col items-center justify-center border-dashed border-2 border-gray-200 h-full"
UPLOAD_ICON = "fas fa-file-upload text-gray-300 font-medium text-6xl"
UPLOAD_BUTTON = "flex justify-center bg-green-400 px-3 py-2 mt-4 text-white rounded shadow"
RESULT_CONTAINER = "flex flex-col bg-white items-center"
RESULT_ITEM = "flex flex-col justify-center bg-white p-2 border-t border-gray-200 w-64"
TOGGLE_TEXT_ATTRIS = {   # 這個常量後來沒用
  "ic-action":"slideToggle",# "ic-target":"#toggle_img",# 以ID定位，只能選擇第一個元素
  "ic-target":"figure"   # 以元素型別定位，會對所有同類元素進行操作
}
 
 
# 為了寫head部分的引入方便，寫個link_函式；下面script_函式類似
def link_(lk):
  return dom.link(rel="stylesheet",type="text/css",href=lk)
 
def script_(s):
  return dom.script(src=s)
 
def page():
  doc = document()
  with doc.head:
    link_("https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css") # tailwind
    link_("https://extra-uru1z3cxu.now.sh/css/extra.css") # 額外寫的擴充套件庫
    link_("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.8.2/css/all.css") # 為了使用font-awesome的圖示
    script_("https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js") # jquery
    script_("http://intercoolerjs.org/release/intercooler-1.2.2.js")  # intercooler
  with doc.body:
    with dom.div(cls=CENTERFRAME) as CenterFrame:
      with dom.form(UPLOAD_FORM_ATTRIS) as UploadForm:
        # 輸入水印文字區
        with dom.div(cls=CARD1) as Card1:
          dom.p("Write down your mark here",cls="text-base font-thin text-white" )
          dom.input(cls=TEXT_INPUT,id="wm_text",type="text",name="mark_text",placeholder="your watermark text")
        # 上傳圖片區
        with dom.div(cls=CARD2) as Card2:
          with dom.div(cls=DASHED_BOX):
            dom.i(cls=UPLOAD_ICON,onclick='''$('#fileupload').click()''')
            dom.p("Find File",id="show_info",cls="text-gray-500 mt-4")
            dom.button("Upload",cls=UPLOAD_BUTTON)
            dom.input(cls="hidden",type="file",id="fileupload",name="ori_img",onchange='''$('#show_info').text(this.value.split("\\\\").pop(-1))''')
 
      # 生成水印圖片區
      with dom.div(cls=RESULT_CONTAINER) as ResultContainer:
        dom.span(id="result_item")
 
  return doc.render()
 
 
def item(result_file_path):
  filename = result_file_path.split('/',1)[-1].split('.')[0]
  print('filename:',filename)
  # 處理圖片，轉成字串
  with open(result_file_path,"rb") as imageFile:
    img_str = base64.b64encode(imageFile.read())
 
  with dom.div(cls=RESULT_ITEM) as ResultItem:
    with dom.a( {
      "ic-action":"slideToggle","ic-target":f"#{filename}"
    }) as ToggleText:
      dom.p(filename,cls="text-sm font-thin text-center text-gray-800")
    with dom.figure(cls="hidden",id=filename): # id中不能帶'.'(點)
      dom.img(title="data src",alt="基於django micro搭建網站實現加水印功能",src = "data:image/jpeg;base64," + str(img_str,'utf-8') ) # 轉str時要加'utf-8'，否則不能去掉b'
 
  return dom.span(id="result_item").render() + ResultItem.render()
 
 
@route('')
def index(request: HttpRequest):
  return HttpResponse(page())
 
@route('file')
def filehandler(request:HttpRequest):
  ori_img = request.FILES.get('ori_img')
  mark_text = request.POST.get('mark_text') # 得用request.POST，因為form提交是用POST方式
  print('mark_text:',mark_text)
  result_file_path = 'output/Toggle_'+ori_img.name  # 打水印後的檔案儲存路徑
 
  with Image(file=ori_img) as img:
    # 先儲存原始圖片
    img.save(filename='userupload/' + ori_img.name)
    # 畫圖，把字畫在原圖上
    with Drawing() as ctx:
      ctx.font_family = 'Times New Roman,Nimbus Roman No9'
      # ctx.font_size = 50
      ctx.font_size = int(img.height) * 0.1
      ctx.text_kerning = 20 # 字間距
      ctx.fill_color = 'grey'
      # ctx.opacity = 0.9  # 不透明性
      img.annotate(mark_text,ctx,left=int(img.width) * 0.1,baseline=int(img.height) * 0.45)
    img.save(filename=result_file_path)
 
  return HttpResponse(item(result_file_path))
 
app = run()

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。