得到图片的过程优化, 已有的图片验证sha256后可复用

工具v4/templates/show_image.html

@@ -4,7 +4,7 @@
     <title>输入备注</title>
     <style>
         img {
-            width: 30%; /* Set the width of the image */
+            width: 50%; /* Set the width of the image */
             height: auto; /* Maintain aspect ratio */
         }
     </style>

工具v4/备注信息收集.py

@@ -1,5 +1,5 @@
 from flask import Flask, render_template, request, redirect, url_for
-import os,shutil
+import os,shutil,hashlib
 from database_tools_2 import *
 
 app = Flask(__name__)
@@ -19,6 +19,16 @@ def show_image():
         mycursor.execute(sql,val)
         content = mycursor.fetchall()[0][0]
         mydb.close()
+        content_hash = hashlib.sha256(content.encode("utf8")).hexdigest()
+        # print(content_hash,type(content_hash))
+        mydb = connect(hostname = db_host, port = db_port, username=db_user, pwd=db_pwd, db = "tikupics")
+        mycursor = mydb.cursor()
+        mycursor.execute("SELECT hash,pic FROM pics WHERE ID = %s;",(id,))
+        ret_list = mycursor.fetchall()
+        if len(ret_list) > 0 and ret_list[0][0] == content_hash:
+            with open(f"static/{id}.png","wb") as f:
+                f.write(ret_list[0][1])
+        else:
             latex_raw = ReadTextFile("模板文件/独立文件模板.txt")
             latexdata = StringSubstitute(r"<<待替换\d*>>",latex_raw,[content])
             makedir("临时文件/pics")
@@ -30,14 +40,25 @@ def show_image():
             os.system(f"pdftocairo -png -r 600 ID{id}-{currentdate}-{currenttime}.pdf")
             os.chdir("../..")
             shutil.copy(f"临时文件/pics/ID{id}-{currentdate}-{currenttime}-1.png",f"static/{id}.png")
-        
+            with open(f"static/{id}.png","rb") as f:
+                image_data = f.read()
+                mycursor.execute("INSERT INTO pics (ID,pic,date,hash) VALUES (%s,%s,%s,%s)",(id,image_data,currentdate,content_hash))
+            mydb.commit()
+        mydb.close()
         return render_template('show_image.html', image_path=f'/static/{id}.png')
 
+
 @app.route('/submit_remarks', methods=['POST'])
 def submit_remarks():
     category = request.form['category']
     remarks = request.form['remarks']
+    # date = GetDate()
+    # mydb = connect(hostname = db_host, port = db_port, username=db_user, pwd=db_pwd, db = "tiku")
+    # mycursor = mydb.cursor()
+
+    # mydb.close()
     return render_template('show_remarks.html', category=category, remarks=remarks)
 
+
 if __name__ == '__main__':
     app.run(debug=True)