Problem with webreading using webread and weboption

2018 11 16
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更新时间：2018 11 19
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I have a link which I need to read information from it and write my info in the web. I used the codes below:
url = 'http://abc/rest_api/qc_steps.json'; (abc is just an example)
options = weboptions('RequestMethod', 'post', 'ArrayFormat','json');
data = webread(url,options)
I get this error:
Error using readContentFromWebService (line 45)
The server returned the status 500 with message "Internal Server Error : An error occurred (23000): SQLSTATE[23000]: Integrity constraint violation: 1048
Column 'field_qc_step_image_ref_target_id' cannot be null" in response to the request to URL
http://abc/rest_api/qc_steps.json.
which "field_qc_step_image_ref_target_id" is an information in the link. But I don't know how to solve it! Can anyone help?

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faran
faran 2018-11-16
I have this information too.
{
"userId":1,
"slideId":530,
"qcStep":{
"index":"background-scoring",
"value":"rejected",
"selected":{
"index":"0.50"
}
}
}
which I thinnk I need to put it on webread, but I get this error:
data = webread(url,'userId','1','slideId','530','index','background-scoring','value','rejected','index','0.50');
Error using readContentFromWebService (line 45)
The server returned the status 404 with message "Not found : Could not find the controller." in response to the request to URL
http://abc/rest_api/qc_steps.json?userId=1&slideId=530&index=background-scoring&value=rejected&index=0.50.

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Hitesh Kumar Dasika
Hitesh Kumar Dasika 2018-11-19

0 个投票

Please try using webwrite instead of webread as you are trying to send HTTP POST request to the mentioned server. webread is usually used for HTTP GET Requests.
webwrite
webwrite provides options to put the data in the request as request body and send unlike webread.

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faran
faran 2018-11-19
Thanks, It worked.
options = weboptions('RequestMethod', 'post', 'ArrayFormat','json','MediaType','application/json');
datainfo.userId=1;
datainfo.slideId=532;
qcStep.index='background-scoring';
qcStep.value='rejected';
selected.index=0.5;
qcStep.selected=selected;
datainfo.qcStep=qcStep;
response = webwrite(url,datainfo,options)

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