{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-06T00:09:22.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-06T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":61330,"title":"Web App POST using system curl (405 error fix)","description":"This challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\r\nThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\r\nGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\r\nThe command string format is:\r\n  cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\r\nThe normal JSON_str, jsonencode(data), must have every \" replaced by \\\"\r\nThe test suite in Test 2 contains the web app code and how it was created","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(33, 33, 33); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none solid rgb(33, 33, 33); white-space: normal; \"\u003e\u003cdiv style=\"block-size: 222px; display: block; min-width: 0px; padding-block-start: 0px; padding-inline-start: 2px; padding-left: 2px; padding-top: 0px; perspective-origin: 468.5px 111px; transform-origin: 468.5px 111px; vertical-align: baseline; \"\u003e\u003cdiv style=\"block-size: 42px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 21px; text-align: left; transform-origin: 444.5px 21px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThis challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe command string format is:\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003e  cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe normal JSON_str, jsonencode(data), must have every \" replaced by \\\"\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe test suite in Test 2 contains the web app code and how it was created\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function cmd = create_curl_str(url,data)\r\n  cmd = sprintf('curl -L -H \"Content-Type: application/json\" -d \"%s\" %s', ...\r\n              strrep(jsonencode(data),'\"','\\\"'), url);\r\nend","test_suite":"%%\r\n% cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\r\n% Note: system(cmd) fails on R2019a but good for R2025\r\ncmdL='curl -L -H \"Content-Type: application/json\" ';\r\nurl='https://script.google.com/macros/s/AKfycbwaEVBCEr4RXTUStLDFpVRtK8l3TsG7MFrWe2HWVCAN7z2RYzoCv6nTb_7tclnSBxL6/exec';\r\njson=' -d \"{\\\"key\\\":\\\"val\\\"}\"'; % JSON_str {\"key\":\"val\"} must be modified to {\\\"key\\\":\\\"val\\\"} for curl\r\ncmd=[cmdL url json]\r\n[status, result]=system(cmd); %Single Value Pair JSON\r\nresult\r\n\r\ndata = struct('key1', 'value1', 'key2', 'value2');\r\ncmd = create_curl_str(url,data);\r\n[status, result]=system(cmd);\r\n\r\nfprintf('system(cmd) response status:%i\\n',status)\r\nresult\r\nrcv_ptr=strfind(result,'\"received\":');\r\nparen_ptr=strfind(result,'}');\r\nJSON_result=result(rcv_ptr+11:paren_ptr(1))\r\njsonencode_data=jsonencode(data)\r\nassert(isequal(JSON_result,jsonencode(data)))\r\n%%\r\n% Web App Source and creation method\r\nassert(isequal(1,1))\r\n%{\r\nThe Web App was created at Google\r\nStep-by-Step: Create a POST-Ready Form (Web App)\r\n1 Go to script.google.com and click + New project.\r\n2 Replace the default code with the above code\r\n3 Click Deploy → New deployment → Type: Web app.\r\n   :Execute as: Me\r\n   :Who has access: Anyone (or Anyone with Google account)\r\n   :Click Deploy and copy the Web app URL.\r\n https://script.google.com/macros/s/random_100_letters/exec\r\n This url can be pasted into a browser and a page should pop up\r\n\r\nfunction doPost(e) {\r\n  try {\r\n    let data;\r\n    \r\n    // Accept both JSON and form-urlencoded data\r\n    if (e.postData \u0026\u0026 e.postData.type === \"application/json\") {\r\n      data = JSON.parse(e.postData.contents);\r\n    } else {\r\n      data = e.parameter;  // form data\r\n    }\r\n\r\n    // Return a nice JSON response\r\n    return ContentService.createTextOutput(JSON.stringify({\r\n      status: \"success\",\r\n      message: \"Form submitted successfully!\",\r\n      timestamp: new Date().toISOString(),\r\n      received: data\r\n    })).setMimeType(ContentService.MimeType.JSON);\r\n    \r\n  } catch (error) {\r\n    return ContentService.createTextOutput(JSON.stringify({\r\n      status: \"error\",\r\n      message: error.toString()\r\n    })).setMimeType(ContentService.MimeType.JSON);\r\n  }\r\n}\r\n\r\n// Optional: Simple test page\r\nfunction doGet() {\r\n  return HtmlService.createHtmlOutput(\"\u003ch1\u003ePOST2 endpoint ready\u003c/h1\u003e\");\r\n}\r\n\r\n%}\r\n%%\r\n% curl source and json tweaks\r\nassert(isequal(1,1))\r\n%Peter Mortensen clarifies usage of \\\" for \" inside a quoted,\", json\r\n%https://stackoverflow.com/questions/7172784/how-do-i-post-json-data-with-curl\r\n%Justin Poehnelt explains curl -L usage versus curl -X Post\r\n%https://dev.to/googleworkspace/youre-probably-using-curl-wrong-with-your-google-apps-script-web-app-1ed8","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":3097,"edited_by":3097,"edited_at":"2026-05-05T17:47:52.000Z","deleted_by":null,"deleted_at":null,"solvers_count":5,"test_suite_updated_at":"2026-05-05T17:47:52.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2026-05-04T23:37:23.000Z","updated_at":"2026-05-07T09:21:52.000Z","published_at":"2026-05-05T02:53:54.000Z","restored_at":null,"restored_by":null,"spam":null,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe command string format is:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e  cmd='curl -L -H \\\"Content-Type: application/json\\\" -d \\\"JSON_str\\\" url'\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe normal JSON_str, jsonencode(data), must have every \\\" replaced by \\\\\\\"\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe test suite in Test 2 contains the web app code and how it was created\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\",\"relationship\":null}],\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"target\":\"/matlab/document.xml\",\"relationshipId\":\"rId1\"}]}"}],"problem_search":{"errors":[],"problems":[{"id":61330,"title":"Web App POST using system curl (405 error fix)","description":"This challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\r\nThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\r\nGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\r\nThe command string format is:\r\n  cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\r\nThe normal JSON_str, jsonencode(data), must have every \" replaced by \\\"\r\nThe test suite in Test 2 contains the web app code and how it was created","description_html":"\u003cdiv style = \"text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(33, 33, 33); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none solid rgb(33, 33, 33); white-space: normal; \"\u003e\u003cdiv style=\"block-size: 222px; display: block; min-width: 0px; padding-block-start: 0px; padding-inline-start: 2px; padding-left: 2px; padding-top: 0px; perspective-origin: 468.5px 111px; transform-origin: 468.5px 111px; vertical-align: baseline; \"\u003e\u003cdiv style=\"block-size: 42px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 21px; text-align: left; transform-origin: 444.5px 21px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThis challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe command string format is:\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003e  cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe normal JSON_str, jsonencode(data), must have every \" replaced by \\\"\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style=\"block-size: 21px; font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; padding-inline-start: 0px; padding-left: 0px; perspective-origin: 444.5px 10.5px; text-align: left; transform-origin: 444.5px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; \"\u003e\u003cspan style=\"block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; \"\u003e\u003cspan style=\"\"\u003eThe test suite in Test 2 contains the web app code and how it was created\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e","function_template":"function cmd = create_curl_str(url,data)\r\n  cmd = sprintf('curl -L -H \"Content-Type: application/json\" -d \"%s\" %s', ...\r\n              strrep(jsonencode(data),'\"','\\\"'), url);\r\nend","test_suite":"%%\r\n% cmd='curl -L -H \"Content-Type: application/json\" -d \"JSON_str\" url'\r\n% Note: system(cmd) fails on R2019a but good for R2025\r\ncmdL='curl -L -H \"Content-Type: application/json\" ';\r\nurl='https://script.google.com/macros/s/AKfycbwaEVBCEr4RXTUStLDFpVRtK8l3TsG7MFrWe2HWVCAN7z2RYzoCv6nTb_7tclnSBxL6/exec';\r\njson=' -d \"{\\\"key\\\":\\\"val\\\"}\"'; % JSON_str {\"key\":\"val\"} must be modified to {\\\"key\\\":\\\"val\\\"} for curl\r\ncmd=[cmdL url json]\r\n[status, result]=system(cmd); %Single Value Pair JSON\r\nresult\r\n\r\ndata = struct('key1', 'value1', 'key2', 'value2');\r\ncmd = create_curl_str(url,data);\r\n[status, result]=system(cmd);\r\n\r\nfprintf('system(cmd) response status:%i\\n',status)\r\nresult\r\nrcv_ptr=strfind(result,'\"received\":');\r\nparen_ptr=strfind(result,'}');\r\nJSON_result=result(rcv_ptr+11:paren_ptr(1))\r\njsonencode_data=jsonencode(data)\r\nassert(isequal(JSON_result,jsonencode(data)))\r\n%%\r\n% Web App Source and creation method\r\nassert(isequal(1,1))\r\n%{\r\nThe Web App was created at Google\r\nStep-by-Step: Create a POST-Ready Form (Web App)\r\n1 Go to script.google.com and click + New project.\r\n2 Replace the default code with the above code\r\n3 Click Deploy → New deployment → Type: Web app.\r\n   :Execute as: Me\r\n   :Who has access: Anyone (or Anyone with Google account)\r\n   :Click Deploy and copy the Web app URL.\r\n https://script.google.com/macros/s/random_100_letters/exec\r\n This url can be pasted into a browser and a page should pop up\r\n\r\nfunction doPost(e) {\r\n  try {\r\n    let data;\r\n    \r\n    // Accept both JSON and form-urlencoded data\r\n    if (e.postData \u0026\u0026 e.postData.type === \"application/json\") {\r\n      data = JSON.parse(e.postData.contents);\r\n    } else {\r\n      data = e.parameter;  // form data\r\n    }\r\n\r\n    // Return a nice JSON response\r\n    return ContentService.createTextOutput(JSON.stringify({\r\n      status: \"success\",\r\n      message: \"Form submitted successfully!\",\r\n      timestamp: new Date().toISOString(),\r\n      received: data\r\n    })).setMimeType(ContentService.MimeType.JSON);\r\n    \r\n  } catch (error) {\r\n    return ContentService.createTextOutput(JSON.stringify({\r\n      status: \"error\",\r\n      message: error.toString()\r\n    })).setMimeType(ContentService.MimeType.JSON);\r\n  }\r\n}\r\n\r\n// Optional: Simple test page\r\nfunction doGet() {\r\n  return HtmlService.createHtmlOutput(\"\u003ch1\u003ePOST2 endpoint ready\u003c/h1\u003e\");\r\n}\r\n\r\n%}\r\n%%\r\n% curl source and json tweaks\r\nassert(isequal(1,1))\r\n%Peter Mortensen clarifies usage of \\\" for \" inside a quoted,\", json\r\n%https://stackoverflow.com/questions/7172784/how-do-i-post-json-data-with-curl\r\n%Justin Poehnelt explains curl -L usage versus curl -X Post\r\n%https://dev.to/googleworkspace/youre-probably-using-curl-wrong-with-your-google-apps-script-web-app-1ed8","published":true,"deleted":false,"likes_count":0,"comments_count":0,"created_by":3097,"edited_by":3097,"edited_at":"2026-05-05T17:47:52.000Z","deleted_by":null,"deleted_at":null,"solvers_count":5,"test_suite_updated_at":"2026-05-05T17:47:52.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2026-05-04T23:37:23.000Z","updated_at":"2026-05-07T09:21:52.000Z","published_at":"2026-05-05T02:53:54.000Z","restored_at":null,"restored_by":null,"spam":null,"simulink":false,"admin_reviewed":false,"description_opc":"{\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThis challenge is to create a curl command to interact with a Google Web App that takes a JSON input and returns the JSON and a few other items.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe usage of system(curl_cmd_str)  works correctly while webwrite returns a 405 error due to Google redirects\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a Web App url and a structure create the curl cmd that will initiate a response to the json encode of the structure.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe command string format is:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e  cmd='curl -L -H \\\"Content-Type: application/json\\\" -d \\\"JSON_str\\\" url'\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe normal JSON_str, jsonencode(data), must have every \\\" replaced by \\\\\\\"\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eThe test suite in Test 2 contains the web app code and how it was created\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\",\"relationship\":null}],\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"target\":\"/matlab/document.xml\",\"relationshipId\":\"rId1\"}]}"}],"term":"tag:\"405 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