def upload_file():
universities = ['VJTI', 'IITB', 'KJSCE']
if request.method == 'POST':
if 'file' not in request.files:
flash("No file selected", "danger")
error = "No file selected"
return render_template('upload.html',
universities=universities,
error=error)
file = request.files['file']
if file.filename == '':
flash("No file selected", "error")
return render_template('upload.html', universities=universities)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['CSV_FOLDER'], filename))
#Merkle Tree init
mt = MerkleTools(hash_type='sha3_256')
count = 0
with open(os.path.join(app.config['CSV_FOLDER'],
filename)) as File:
reader = csv.reader(File)
for row in reader:
#studentID CPI Name batch college
data = str(row[0]) + str(row[2]) + str(row[1]) + str(
row[3]) + session['username']
batch = str(row[3])
mt.add_leaf(data, do_hash=True)
count += 1
mt.make_tree()
# if mt.get_leaf_count() != count:
# print("not equal")
# print(count, mt.get_leaf_count())
if mt.get_tree_ready_state:
merkleRoot = mt.get_merkle_root()
institute = session['username']
bc = Blockchain(institute)
print("Adding to the blockchain: ", session['username'], batch,
merkleRoot)
try:
bc.addBatchMerkleRoot(batch, merkleRoot)
except:
error = "Institute not registered!"
return render_template('upload.html',
universities=universities,
error=error)
itr = 0
with open(os.path.join(app.config['CSV_FOLDER'],
filename)) as File:
reader = csv.reader(File)
for row in reader:
data = {}
data["cpi"] = str(row[2])
data["name"] = str(row[1])
data["year"] = str(row[3])
data["studentId"] = str(row[0])
data["institution"] = session['username']
data["merklePath"] = mt.get_proof(itr)
itr += 1
filename = str(row[1]) + '.json'
with open(
os.path.join(app.config['RECEIPT_FOLDER'],
filename), 'w') as json_file:
json_file.write(json.dumps(data))
flash("Successfully uploaded to blockchain!", "success")
return render_template('upload.html', universities=universities)
