问题是您的请求标头中的Content-Type 设置不正确。 [Reference]
Tastypie 仅识别 xml、json、yaml 和 bplist。所以在发送 POST 请求时，需要将请求头中的Content-Type 设置为其中之一（例如，application/json）。
编辑：
您似乎正在尝试通过以下方式发送包含文件的多部分表单
好吃。
Issac Kelly 关于 Tastypie 文件上传支持的一点背景知识
路线图 1.0 最终版（尚未发布）：
- 实现一个 Base64FileField，它接受用于 PUT/POST 的 base64 编码文件（如问题 #42 中的文件），并为 GET 请求提供 URL。这将是主要的 sweetpie 存储库的一部分。
- 我们希望鼓励其他实施作为独立项目实施。有几种方法可以做到这一点，其中大多数都有些挑剔，并且它们都有不同的缺点，我们希望有其他选择，并记录每种方法的优缺点
这意味着至少目前，Tastypie 不正式支持多部分
上传文件。但是，据说在野外有叉子正在工作
好吧，this 是其中之一
他们。不过我还没有测试过。
现在让我尝试解释一下您遇到该错误的原因。
在 Tastypie resource.py, line 452:
def dispatch(self, request_type, request, **kwargs):
"""
Handles the common operations (allowed HTTP method, authentication,
throttling, method lookup) surrounding most CRUD interactions.
"""
allowed_methods = getattr(self._meta, "%s_allowed_methods" % request_type, None)
if 'HTTP_X_HTTP_METHOD_OVERRIDE' in request.META:
request.method = request.META['HTTP_X_HTTP_METHOD_OVERRIDE']
request_method = self.method_check(request, allowed=allowed_methods)
method = getattr(self, "%s_%s" % (request_method, request_type), None)
if method is None:
raise ImmediateHttpResponse(response=http.HttpNotImplemented())
self.is_authenticated(request)
self.is_authorized(request)
self.throttle_check(request)
# All clear. Process the request.
request = convert_post_to_put(request)
response = method(request, **kwargs)
# Add the throttled request.
self.log_throttled_access(request)
# If what comes back isn't a ``HttpResponse``, assume that the
# request was accepted and that some action occurred. This also
# prevents Django from freaking out.
if not isinstance(response, HttpResponse):
return http.HttpNoContent()
return response
convert_post_to_put(request) 从这里调用。还有here is the code for
convert_post_to_put：
# Based off of ``piston.utils.coerce_put_post``. Similarly BSD-licensed.
# And no, the irony is not lost on me.
def convert_post_to_VERB(request, verb):
"""
Force Django to process the VERB.
"""
if request.method == verb:
if hasattr(request, '_post'):
del(request._post)
del(request._files)
try:
request.method = "POST"
request._load_post_and_files()
request.method = verb
except AttributeError:
request.META['REQUEST_METHOD'] = 'POST'
request._load_post_and_files()
request.META['REQUEST_METHOD'] = verb
setattr(request, verb, request.POST)
return request
def convert_post_to_put(request):
return convert_post_to_VERB(request, verb='PUT')
而且这种方法并不是真正打算像它那样处理多部分
阻止对request.body 的任何进一步访问的副作用，因为
_load_post_and_files() 方法会将_read_started 标志设置为True：
Django request.body 和 _load_post_and_files():
@property
def body(self):
if not hasattr(self, '_body'):
if self._read_started:
raise Exception("You cannot access body after reading from request's data stream")
try:
self._body = self.read()
except IOError as e:
six.reraise(UnreadablePostError, UnreadablePostError(*e.args), sys.exc_info()[2])
self._stream = BytesIO(self._body)
return self._body
def read(self, *args, **kwargs):
self._read_started = True
return self._stream.read(*args, **kwargs)
def _load_post_and_files(self):
# Populates self._post and self._files
if self.method != 'POST':
self._post, self._files = QueryDict('', encoding=self._encoding), MultiValueDict()
return
if self._read_started and not hasattr(self, '_body'):
self._mark_post_parse_error()
return
if self.META.get('CONTENT_TYPE', '').startswith('multipart'):
if hasattr(self, '_body'):
# Use already read data
data = BytesIO(self._body)
else:
data = self
try:
self._post, self._files = self.parse_file_upload(self.META, data)
except:
# An error occured while parsing POST data. Since when
# formatting the error the request handler might access
# self.POST, set self._post and self._file to prevent
# attempts to parse POST data again.
# Mark that an error occured. This allows self.__repr__ to
# be explicit about it instead of simply representing an
# empty POST
self._mark_post_parse_error()
raise
else:
self._post, self._files = QueryDict(self.body, encoding=self._encoding), MultiValueDict()
所以，你可以（虽然可能不应该）猴子补丁 Tastypie's
convert_post_to_VERB() 方法通过设置 request._body 通过调用
request.body 然后立即设置 _read_started=False 以便
_load_post_and_files() 将从 _body 读取并且不会设置
_read_started=True:
def convert_post_to_VERB(request, verb):
"""
Force Django to process the VERB.
"""
if request.method == verb:
if hasattr(request, '_post'):
del(request._post)
del(request._files)
request.body # now request._body is set
request._read_started = False # so it won't cause side effects
try:
request.method = "POST"
request._load_post_and_files()
request.method = verb
except AttributeError:
request.META['REQUEST_METHOD'] = 'POST'
request._load_post_and_files()
request.META['REQUEST_METHOD'] = verb
setattr(request, verb, request.POST)
return request