I get this error when I try to retrieve items from Parse.com
In 10 attempts it failed around 6 times.
PFQuery *query = [PFQuery queryWithClassName:#"ServiceCatalogue"];
items = [[NSMutableArray alloc] init];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
NSLog(#"ServiceCatalogue retrieved");
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
And getting error:
"Error: Error Domain=NSCocoaErrorDomain Code=3840 "The operation
couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start
with array or object and option to allow fragments not set.)
UserInfo=0x7fcfbaadc480 {NSDebugDescription=JSON text did not start
with array or object and option to allow fragments not set.} {
NSDebugDescription = "JSON text did not start with array or object and option to allow fragments not set.";
}"
As indicated in this status report from Parse, it looks like their servers were creating an elevated number of errors.
2nd October 2015 - Elevated Error Rates - Incident Report for Parse
Related
I am trying to parse a json payload sent via a POST request to a NGINX/Openresty location. To do so, I combined Openresty's content_by_lua_block with its cjson module like this:
# other locations above
location /test {
content_by_lua_block {
ngx.req.read_body()
local data_string = ngx.req.get_body_data()
local cjson = require "cjson.safe"
local json = cjson.decode(data_string)
local endpoint_name = json['endpoint']['name']
local payload = json['payload']
local source_address = json['source_address']
local submit_date = json['submit_date']
ngx.say('Parsed')
}
}
Parsing sample data containing all required fields works as expected. A correct JSON object could look like this:
{
"payload": "the payload here",
"submit_date": "2018-08-17 16:31:51",
},
"endpoint": {
"name": "name of the endpoint here"
},
"source_address": "source address here",
}
However, a user might POST a differently formatted JSON object to the location. Assume a simple JSON document like
{
"username": "JohnDoe",
"password": "password123"
}
not containing the desired fields/keys.
According to the cjson module docs, using cjson (without its safe mode) will raise an error if invalid data is encountered. To prevent any errors being raised, I decided to use its safe mode by importing cjson.safe. This should return nil for invalid data and provide the error message instead of raising the error:
The cjson module will throw an error during JSON conversion if any invalid data is encountered. [...]
The cjson.safe module behaves identically to the cjson module, except when errors are encountered during JSON conversion. On error, the cjson_safe.encode and cjson_safe.decode functions will return nil followed by the error message.
However, I do not encounter any different error handling behavior in my case and the following traceback is shown in Openresty's error.log file:
2021/04/30 20:33:16 [error] 6176#6176: *176 lua entry thread aborted: runtime error: content_by_lua(samplesite:50):16: attempt to index field 'endpoint' (a nil value)
Which in turn results in an Internal Server Error:
<html>
<head><title>500 Internal Server Error</title></head>
<body>
<center><h1>500 Internal Server Error</h1></center>
<hr><center>openresty</center>
</body>
</html>
I think a workaround might be writing a dedicated function for parsing the JSON data and calling it with pcall() to catch any errors. However, this would make the safe mode kind of useless. What am I missing here?
Your “simple JSON document” is a valid JSON document. The error you are facing is not related to cjson, it's a standard Lua error:
resty -e 'local t = {foo = 1}; print(t["foo"]); print(t["foo"]["bar"])'
1
ERROR: (command line -e):1: attempt to index field 'foo' (a number value)
stack traceback:
...
“Safeness” of cjson.safe is about parsing of malformed documents:
cjson module raises an error:
resty -e 'print(require("cjson").decode("[1, 2, 3"))'
ERROR: (command line -e):1: Expected comma or array end but found T_END at character 9
stack traceback:
...
cjson.safe returns nil and an error message:
resty -e 'print(require("cjson.safe").decode("[1, 2, 3"))'
nilExpected comma or array end but found T_END at character 9
I am trying to link my django web app to Azure ML API. I do have Django form with all the required inputs for my Azure API.
def post(self,request):
form = CommentForm(request.POST)
url = 'https://ussouthcentral.services.azureml.net/workspaces/7061a4b24ea64942a19f74ed36e4b438/services/ae2c257d6e164dca8d433ad1a1f9feb4/execute?api-version=2.0&format=swagger'
api_key = # Replace this with the API key for the web service
headers = {'Content-Type':'application/json', 'Authorization':('Bearer '+ api_key)}
if form.is_valid():
age = form.cleaned_data['age']
bmi = form.cleaned_data['bmi']
args = {"age":age,"bmi":bmi}
json_data = str.encode(json.dumps(args))
print(type(json_data))
r= urllib.request.Request(url,json_data,headers)
try:
response = urllib.request.urlopen(r)
result = response.read()
print(result)
except urllib.request.HTTPError as error:
print("The request failed with status code: " + str(error.code))
print(json_data)
# Print the headers - they include the requert ID and the timestamp, which are useful for debugging the failure
print(error.info())
print(json.loads(error.read()))
return render(request,self.template_name)
When i try to submit the form i am getting type error -
TypeError('POST data should be bytes, an iterable of bytes, or a file object. It cannot be of type str.',)
Getting status code - 400 and below error
{'error': {'code': 'BadArgument', 'message': 'Invalid argument provided.', 'details': [{'code': 'RequestBodyInvalid', 'message': 'No request body provided or error in deserializing the request body.'}]}}
Arguments are using print(json_data) -
b'{"age": 0, "bmi": 22.0}'
Can someone help me on this?
Try to use JsonResponse:
https://docs.djangoproject.com/en/2.1/ref/request-response/#jsonresponse-objects
Also, I don't think you need a template for API response.
return JsonResponse({'foo': 'bar'})
Thanks all. I found the error it was the data which was not in proper order.
I can't seem to catch an exception when using json.loads even though I specifically call it out. I largely see this when trying to stress my server with lots of client connection sending data very quickly. See my error below:
(I've replaced my IP address with X's in the error code)
EX: Unterminated string starting at: line 1 column 49 (char 48) Data:
'{"ap-hdop":0.55,"rtcmin":"38","ap-latdec":3.134,"a' error: uncaptured
python exception, closing channel
(:Unterminated string
starting at: line 1 column 49 (char 48)
[//faraday_server_handler.py|collect_incoming_data|34]
[/usr/lib/python2.7/json/init.py|loads|338]
[/usr/lib/python2.7/json/decoder.py|decode|366]
[/usr/lib/python2.7/json/decoder.py|raw_decode|382])
I understand this that the code fails because I simply miss a double quotes on the line:
'{"ap-hdop":0.55,"rtcmin":"38","ap-latdec":3.134,"a'
This line is usually a LOT longer so that "a.... was supposed to keep going and complete it's quotes.
Here's my relevant code:
def collect_incoming_data(self, data):
"""Read an incoming message from the client, place JSON message data into buffer"""
#self.logger.debug('collect_fing_data() -> (%d bytes)\n"""%s"""', len(data), data)
try:
loaded_data = json.loads(data)
except ValueError, ex:
self.handle_error()
type,value,traceback = sys.exc_info()
print type
#print "Collect Incoming Data: " . time.strftime("%Y-%m-%d %H:%M:%S",time.gmtime())
print "EX: ", ex
print "Data: ",repr(data)
Any ideas? I scoured the internet to see if I can find this issue, but I appear to be setting up to capture the exception which everyone else having this issue with loads seems to suggest to do.
EDIT 3/1/2016 - Evening
Commenting out my exception handle_error() let me see more of the error:
except ValueError, ex:
self.handle_error()
type,value,traceback = sys.exc_info()
print type
#print "Collect Incoming Data: " . time.strftime("%Y-%m-%d %H:%M:%S",time.gmtime())
print "EX: ", ex
print "Data: ",repr(data)
Below is my new error, I've commented out personal data. It's apparent that the issue I really have now is in-fact the unterminated string
EX: Unterminated string starting at:
line 1 column 49 (char 48) Data:
'{"ap-hdop":0.55,"rtcmin":"31","ap-latdec":XX.XXX,"a' EX: No JSON object could be decoded Data:
'p-latdeg":34,"adc6":2006,"adc7":2007,"adc4":2004,"adc5":2005,"adc2":2002,"adc3":2003,"adc0":2000,"adc1":2001,"gpio-0":30,"gpio-1":50,"gpio-2":70,"speed":5.0,"adc8":2008,"rtcday":"01","longdeg":118,"longdec":XX.XXX,"altitude":31.0,"ap-speed":0.0,"ap-pdop":0.77,"lat-dir":"N","long-dir":"W","hdop":0.01,"ap-rf":0,"alt-units":"M","rtcdow":"2","callsign":"XXXXX","ap-callsign":"XXXXX","id":1,"ap-id":1,"rtcyear":"2016","rtcmon":"03","ap-vdop":0.66,"ap-lat-dir":"N","vdop":0.02,"rtchour":"22","latdec":XX.XXX,"latdeg":34,"ap-longdeg":118,"ap-longdec":XX.XXX,"rtcsec":"15","ap-altitude":86.0,"ap-long-dir":"W","pdop":0.01,"ap-alt-units":"M","faraday-port":0}'
OK my original question was answered which was "Why am I not catching the ValueError exception even though I am providing code to do just that?"
#tadhg McDonald-jensen was correct with his comment to remove my call to handle_error().
I still have some other issues but they are a different question. Thanks!
all. I'm trying to parse a CSV file using CsvParser, but I get an IOException: Stream closed error after reading in line 57 (of ~6500). Does anyone know what could be causing this? Here is a code snippet and the error:
#!/usr/bin/ groovy
package csvTest
#Grab ('com.xlson.groovycsv:groovycsv:1.0')
import com.xlson.groovycsv.CsvParser
def csvFile = new File("file.csv").withReader {
CsvParser.parseCsv(it)
}
csvFile.each {
println it
}
Caught: java.io.IOException: Stream closed
java.io.IOException: Stream closed
at au.com.bytecode.opencsv.CSVReader.getNextLine(CSVReader.java:245)
at au.com.bytecode.opencsv.CSVReader.readNext(CSVReader.java:212)
at au.com.bytecode.opencsv.CSVReader$readNext.call(Unknown Source)
at com.xlson.groovycsv.CsvIterator.hasNext(CsvIterator.groovy:72)
at csvTest.CsvTest.run(CsvTest.groovy:12)
The CsvParser is lazy, so reads rows as they are requested (rather than loading them all into memory.
The withReader call closes the Reader once the Closure is finished.
So when you try to do csvFile.each, the stream is closed.
This should work:
new File("file.csv").withReader {
def csvFile = CsvParser.parseCsv( it )
csvFile.each {
println it
}
}
My code for JSON parsing:
// Store incoming data into a string
NSString *jsonString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
// Create a dictionary from the JSON string
NSDictionary *results = [jsonString JSONValue];
NSLog(#"%#",jsonString);
When I debug the code I am getting the jsonString but getting 0 key value pairs.
And Error as:
-JSONValue failed. Error trace is: (
"Error Domain=org.brautaset.JSON.ErrorDomain Code=5 \"Unescaped control character '0x0'\" UserInfo=0x4d2e030
{NSLocalizedDescription=Unescaped control character '0x0'}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Object value expected for key: id\" UserInfo=0x4d2e130 {NSUnderlyingError=0x4d2e090
\"Unescaped control character '0x0'\", NSLocalizedDescription=Object
value expected for key: id}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Expected value while parsing array\" UserInfo=0x4d2e180
{NSUnderlyingError=0x4d2e110 \"Object value expected for key: id\",
NSLocalizedDescription=Expected value while parsing array}",
"Error Domain=org.brautaset.JSON.ErrorDomain Code=3 \"Object value expected for key: predictions\" UserInfo=0x4d2e250
{NSUnderlyingError=0x4d2e210 \"Expected value while parsing array\",
NSLocalizedDescription=Object value expected for key: predictions}"
Use JSON validator to validate your string whether that is a valid JSON.