Get Snapshot from Hikvision Camera

[admin]

Thanks, here's a couple of things you can try:

1. Remove space between items in the Authorization header.
Replace:

Code:

return 'Digest ' .. table.concat(digest, ', ')

With:

Code:

return 'Digest ' .. table.concat(digest, ',')

2. Modify the items and their order in the header.
Replace:

Code:

local auth = {
  { 'username', user },
  { 'realm', ht.realm },
  { 'nonce', ht.nonce },
  { 'uri', uri },
  { 'cnonce', cnonce },
  { 'nc', nc, unquote = true },
  { 'qop', 'auth' },
  { 'algorithm', 'MD5' },
  { 'response', response },
}

With:

Code:

local auth = {
  { 'username', user },
  { 'realm', ht.realm },
  { 'nonce', ht.nonce },
  { 'uri', uri },
  { 'cnonce', cnonce },
  { 'nc', nc, unquote = true },
  -- { 'algorithm', 'MD5' },
  { 'response', response },
  { 'qop', 'auth' },
}

3. Make the cnonce longer.
Replace:

Code:

local cnonce = string.format('%08x', os.time())

With:

Code:

local cnonce = md5sum(string.format('%08x', os.time()))

When setting cnonce manually I get the same header as curl does by applying change 1 and 2.