How do I Post messages to Azure Queue Storage using Postman? - azure

Question

I need to do this all within Postman application. I have found examples that use blob and tables but they didn't seem to fit with the queue storage. I think the biggest problem is that I am unable to create the signature part properly.
I believe I managed to execute Get Message in postman but I get "Server failed to authenticate the request." error upon Post request. The message I'm trying to post is in XML format and uses the same pre-request Script as the Get.
Pre-request Script of the Post and Get request (copied from online sources):
const storageAccount = pm.variables.get('azure_storage_account');
const accountKey = pm.variables.get('azure_storage_key');
pm.variables.set("header_date", new Date().toUTCString());
// Get hash of all header-name:value
const headers = pm.request.getHeaders({ ignoreCase: true, enabled: true });
// Construct Signature value for Authorization header
var signatureParts = [
pm.request.method.toUpperCase(),
headers["content-encoding"] || "",
headers["content-language"] || "",
headers["content-length"] || "",
// pm.request.body ? pm.request.body.toString().length || "" : "",
headers["content-md5"] || "",
headers["content-type"] || "",
headers["x-ms-date"] ? "" : (pm.variables.get("header_date") || ""),
headers["if-modified-since"] || "",
headers["if-match"] || "",
headers["if-none-match"] || "",
headers["if-unmodified-since"] || "",
headers["range"] || ""
];
// Construct CanonicalizedHeaders
const canonicalHeaderNames = [];
Object.keys(headers).forEach(key => {
if (key.startsWith("x-ms-")) {
canonicalHeaderNames.push(key);
}
});
// Sort headers lexographically by name
canonicalHeaderNames.sort();
const canonicalHeaderParts = [];
canonicalHeaderNames.forEach(key => {
let value = pm.request.getHeaders({ ignoreCase: true, enabled: true })[key];
// Populate variables
value = pm.variables.replaceIn(value);
// Replace whitespace in value but not if its within quotes
if (!value.startsWith("\"")) {
value = value.replace(/\s+/, " ");
}
canonicalHeaderParts.push(`${key}:${value}`);
});
// Add headers to signature
signatureParts.push.apply(signatureParts, canonicalHeaderParts);
// Construct CanonicalizedResource
const canonicalResourceParts = [
`/${pm.variables.get("azure_storage_account")}${pm.request.url.getPath()}`
];
const canonicalQueryNames = [];
pm.request.url.query.each(query => {
canonicalQueryNames.push(query.key.toLowerCase());
});
canonicalQueryNames.sort();
canonicalQueryNames.forEach(queryName => {
const value = pm.request.url.query.get(queryName);
// NOTE: This does not properly explode multiple same query params' values
// and turn them into comma-separated list
canonicalResourceParts.push(`${queryName}:${value}`);
});
// Add resource to signature
signatureParts.push.apply(signatureParts, canonicalResourceParts);
console.log("Signature Parts", signatureParts);
// Now, construct signature raw string
const signatureRaw = signatureParts.join("\n");
console.log("Signature String", JSON.stringify(signatureRaw));
// Hash it using HMAC-SHA256 and then encode using base64
const storageKey = pm.variables.get("azure_storage_key");
const signatureBytes = CryptoJS.HmacSHA256(signatureRaw, CryptoJS.enc.Base64.parse(storageKey));
const signatureEncoded = signatureBytes.toString(CryptoJS.enc.Base64);
console.log("Storage Account", pm.variables.get("azure_storage_account"));
console.log("Storage Key", storageKey);
// Finally, make it available for headers
pm.variables.set("header_authorization",
`SharedKey ${pm.variables.get("azure_storage_account")}:${signatureEncoded}`);
Headers in Postman:
Headers and URI of Request
Does anyone have working examples or knows where to move from here?
Edit:
Adding console and Error images:
Console output censored for safety
Error output censored for safety

Answer 1

As you said it is working well for Get And if using SAS ,it maybe permission issue .make sure to Storage-Queue-Contributor permissions on the storage queue.
There can be many reasons for this error if using SAS :
Check if you have insufficient SAS Permissions. Check if you marked read, write,list permissioms .Or try generating the new SAS key .
Make sure request does not include any empty headers when it is being access programmatically. If the value of a particular header is empty (or null), the header should be excluded from the request.
Also if above are not the reasons , try upgrading versions of sdks
4.Do check for proper encoding ex: UTF-8.
See Azure Storage Queue via REST API c# using Shared Key Authentication - Stack Overflow
References:
c# - The MAC signature found in the HTTP request ' ' is not the
same as any computed signature. Server used following string to
sign: 'PUT - Stack Overflow
Authorize with Shared Key (REST API) - Azure Storage | Microsoft
Docs
rest - The MAC signature found in the HTTP request '...' is not the
same as any computed signature - Stack Overflow