上传文件返回的json数据会被提示下载问题解决方案_javascript技巧
程序员文章站
2022-06-01 14:05:16
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最近项目中出现上传文件返回的json数据会被提示下载,只有在ie10+中才会出现这个问题。前端使用jQuery的插件ajaxForm提交表单,后台返回的数据格式为json。代码如下:
def jsonp(func):
"""Wraps JSONified output for JSONP requests."""
@wraps(func)
def decorated_function(*args, **kwargs):
callback = request.args.get('callback', False)
temp_content = func(*args, **kwargs)
if isinstance(temp_content, dict):
temp_content.setdefault('success', True)
temp_content.setdefault('code', 200)
try:
temp_content = json.dumps(temp_content, indent=4)
except UnicodeDecodeError:
try:
temp_content = ujson.dumps(temp_content)
except StandardError as e:
logger.exception(e)
temp_content = json.dumps({'success': False, 'code': 500, 'info': 'INVALID_CONTENT'})
temp_content = cgi.escape(temp_content)
if callback:
# 依据 http://evilcos.me/?p=425,jsonp添加/**/头部会安全一些
content = '/**/' + str(callback) + '(' + temp_content + ')'
mimetype = 'application/javascript'
headers = {'charset':'utf-8'}
return current_app.response_class(content, mimetype=mimetype,headers=headers)
else:
mimetype = 'application/json'
headers = {'charset':'utf-8'}
content = temp_content
return current_app.response_class(content, mimetype=mimetype,headers=headers)
elif isinstance(temp_content, basestring):
temp_content = cgi.escape(temp_content)
return temp_content
else:
return temp_content
return decorated_function
@mod.route('/patch/install.json', methods=['POST'])
@jsonp
def patch_install():
return {'data': 'data'}
$('#form').ajaxSubmit({
url : '/patch/install.json',
type : 'post',
dataType : 'json',
iframe : true,
success: function(res) {
// code
}
});
def plain(func):
"""wrap text/html reponse"""
@wraps(func)
def _inner(*args, **kwargs):
resp = func(*args, **kwargs)
if isinstance(resp, dict):
resp.setdefault('success', True)
resp.setdefault('code', 200)
resp = json.dumps(resp)
resp = cgi.escape(resp)
return current_app.response_class(resp, mimetype='text/html', headers={'charset': 'utf-8'})
elif isinstance(resp, basestring):
resp = cgi.escape(resp)
return current_app.response_class(resp, mimetype='text/html', headers={'charset': 'utf-8'})
else:
return resp
return _inner
@mod.route('/patch/install.json', methods=['POST'])
@plain
def patch_install():
return {'data': 'data'}
后端Python:
复制代码 代码如下:
def jsonp(func):
"""Wraps JSONified output for JSONP requests."""
@wraps(func)
def decorated_function(*args, **kwargs):
callback = request.args.get('callback', False)
temp_content = func(*args, **kwargs)
if isinstance(temp_content, dict):
temp_content.setdefault('success', True)
temp_content.setdefault('code', 200)
try:
temp_content = json.dumps(temp_content, indent=4)
except UnicodeDecodeError:
try:
temp_content = ujson.dumps(temp_content)
except StandardError as e:
logger.exception(e)
temp_content = json.dumps({'success': False, 'code': 500, 'info': 'INVALID_CONTENT'})
temp_content = cgi.escape(temp_content)
if callback:
# 依据 http://evilcos.me/?p=425,jsonp添加/**/头部会安全一些
content = '/**/' + str(callback) + '(' + temp_content + ')'
mimetype = 'application/javascript'
headers = {'charset':'utf-8'}
return current_app.response_class(content, mimetype=mimetype,headers=headers)
else:
mimetype = 'application/json'
headers = {'charset':'utf-8'}
content = temp_content
return current_app.response_class(content, mimetype=mimetype,headers=headers)
elif isinstance(temp_content, basestring):
temp_content = cgi.escape(temp_content)
return temp_content
else:
return temp_content
return decorated_function
@mod.route('/patch/install.json', methods=['POST'])
@jsonp
def patch_install():
return {'data': 'data'}
前端js代码:
复制代码 代码如下:
$('#form').ajaxSubmit({
url : '/patch/install.json',
type : 'post',
dataType : 'json',
iframe : true,
success: function(res) {
// code
}
});
解决办法:
需要将后端返回的数据格式改成text/html格式的,如下:
复制代码 代码如下:
def plain(func):
"""wrap text/html reponse"""
@wraps(func)
def _inner(*args, **kwargs):
resp = func(*args, **kwargs)
if isinstance(resp, dict):
resp.setdefault('success', True)
resp.setdefault('code', 200)
resp = json.dumps(resp)
resp = cgi.escape(resp)
return current_app.response_class(resp, mimetype='text/html', headers={'charset': 'utf-8'})
elif isinstance(resp, basestring):
resp = cgi.escape(resp)
return current_app.response_class(resp, mimetype='text/html', headers={'charset': 'utf-8'})
else:
return resp
return _inner
@mod.route('/patch/install.json', methods=['POST'])
@plain
def patch_install():
return {'data': 'data'}
注意:此例后端是用Python,如果项目中遇到同样问题,改成对应语言
总结,其实解决这个问题,简单的说就一句话“将后端返回的数据格式改成text/html格式的”