XMPP Multi user chat setting avatar image for the group chat

不打扰是莪最后的温柔 提交于 2019-12-05 08:53:36

The better solution would be to host an image in some other server , do the upload and get the public path for that image and share as a custom stanza for the group image.

Example

  1. Start uploading image
  2. Get public image path like https://...some url.../groupimage_timestamp.jpg
  3. Share this message as group chat message with following stanza
<message from=abc@muc-light.chat.server.com to mygroup@muc-light.chat.server.com type=groupchat id=groupimage-XXXX>
  <body>groupimage</body>
  <metadata>
   <type>groupimage>
   <filesize>..bytes</filesize>
   <imageurl>https://...someurl.../groupimage_timestamp.jpg</imageurl>
  </metadata>
  </message>
  1. Broadcast this message now as normal group message.
  2. Once any receipient get this message he will identify that the group image url everytime you updated is different as the timestamp factory for the file name at end is differnet (if you use image caching)
    1. it will automatically update this image after parsing this stanza.

This is how to my understanding the whatsapp guys also doing.

As of 2018, use MUC vCards: set the PHOTO-bearing vCard directly on the chatroom MUC.

https://docs.ejabberd.im/tutorials/muc-vcard/

Refer to XEP-0054 and XEP-0153.

<iq id='set1' type='set' to='test@conference.localhost'> <vCard xmlns='vcard-temp'> <PHOTO> <TYPE>image/png</TYPE> <BINVAL> iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAACXBIWXMAAAsTAAALEwEAmpwYAAAB1WlUWHRYTUw6Y29tLmFkb2JlLnhtcAAAAAAAPHg6eG1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0az0iWE1QIENvcmUgNS40LjAiPgogICA8cmRmOlJERiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMDIvMjItcmRmLXN5bnRheC1ucyMiPgogICAgICA8cmRmOkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIgogICAgICAgICAgICB4bWxuczp0aWZmPSJodHRwOi8vbnMuYWRvYmUuY29tL3RpZmYvMS4wLyI+CiAgICAgICAgIDx0aWZmOkNvbXByZXNzaW9uPjE8L3RpZmY6Q29tcHJlc3Npb24+CiAgICAgICAgIDx0aWZmOk9yaWVudGF0aW9uPjE8L3RpZmY6T3JpZW50YXRpb24+CiAgICAgICAgIDx0aWZmOlBob3RvbWV0cmljSW50ZXJwcmV0YXRpb24+MjwvdGlmZjpQaG90b21ldHJpY0ludGVycHJldGF0aW9uPgogICAgICA8L3JkZjpEZXNjcmlwdGlvbj4KICAgPC9yZGY6UkRGPgo8L3g6eG1wbWV0YT4KAtiABQAADkVJREFUeAHtWgtwVNUZ/nY3m0022bxIyItAIBBArZRUUbCoKCgVnWJxxlataO1rlKl2amec1urUdmrp2KE6nXFgGIWpQGmlzCDaoTDUBwoMVcFCeOQFhDwhCXlsNrub3fT7z7l3H8kmm4RUWsNJ7uvcc//zf//r/OectfSxYBwX6zjGrqBfEcDltID/Be+7rBZgsVgup/yvuIBI4LJawGVX//gUQB8iY0/C56EFlWj0Szfi+7+Znow8ThAi5N84GRA1Hek3MvRY/huJkEg4Eq90GAuwtItVbypFayosCM14bIFo0LqtxTK0ZweDfvZr5WHDmAogGAwq3q3W2AwEg33weHrQ6fYgM90Fh8OuzHGgEARILKBh840E2dcXVIBMwcm1t7cbXn8LvN4L8PnOwx+4yLo2+PwNSHfNx8QJi2C1JuKSXUBrW2syErinx4uW1nY0NLbgXP0FNDS34ejJelTVd+Cplbfi9lvKIvlV96ZFuD3n0Ni8DclJ03kUIcmRB0diFhm2hyxGQGsTF01qgXt9LejoOonOrk/g7j5AsJsQCOhW0pzyx6T8LcjJukWBF6sZtQA0cA4jVvEpra229k5UVdfhyLEaHPi0BusPngM+7BR98GjEzKVzsGX1A5h7bWkUYPWga3i2INDrRlPLj9UQJcaUkHA1BXEXUlPmIS31GqQ6i2GzJYU+c3fX4nzrbrS1vw6vb5+ql+/IGr8tQV+wCn18nlp0EBMy5+meDPcbsQuYGje1HQgEUVFVi/f3H8Xf9hzFrjfq2IGXhwNZC11o9VP0B9x4ee1teORbS5DmSoliQD0YJ9OUO7sqcLK6lIIt4RsfgsFapT2JKzYCSU56FJkZy5Hhmou2jkO0lhXopablndVazO8cdC0RvIXXOvXttKL9yM66Ubmc2IRpNSMSgPi4aFsOAX74aAXefOsAfrvuCFDrAaY6YS9woCTVDpfDhkO7W4A5Tux+cQUW33qdghkgDatBw8AdupgC6Og6hZNVM9kPIViy+F5M30XmAzxqKBBt1gJY7qWdzVbKd262reNV6sQqC+j3dSgq2IGC3HtYL7HFfKduh+8CAt7U+qnKs9j4l3fxm58fFHKwLEjD5Bkp8NLJnAlW1Lt70bGrHt9/ugzPrFqOqVPyVW9CwzZIgNTsxDoTNFqJuEm9FIHYbC7e+wiogfc5vE/g/SnjY0oFoqgS+P2VyMpcrcDrl2HNG43jCyDS5Ls9Xry54z2sfGYXcLoHhYsy4aAaznl6UdsTwLSUBFTWUAuVXry++T7cf++tNFcHtaQtxxSg2flwr6JLEbTWO4UhAiHrFksGr208JMZIEZOXvopooZWwJ85FUf531BvTutRDxGnIIGiajDBeW9eEF9Zsw/rfHwZumIDS0hRUU9O9dL4JNPf0RAsqd1/A9cvz8cet92Fe2WzVjbiKTWx1BIU2pfFGfaPNN1wloC+GH3kn/Fosibzz8J4RP+9ljiDZhlBi8zCoAEzw4kv/Lq/Csic3onZPK2bekYcL1PapDr/qPD/ZhgY+t7zfgmdfXIhVjy1Dbo74rfjnyMHLdzqp4Y1WvVQNr6j2Wey3kdF/FlwperTRlhObREwBRIL/9LNTKFuxjlYWxKw7J+CEAZyiRq7DioaabnFHbH/7Ydxz5wKl7cFMXmsoPiplAbH5HbJWU25krMqjC5xATe1qTC9+Hon29EGtIKZdmIyeZLAre2i9BGHMmJGKE+0+wa00k51oRVNjD+5dXIhj//wRlt/1VQVeRXm6jI7CYX5NoYRr4tzFl9MQBEQIhWjvXIPqs6sRCHrJj1UJof9HAwQgjIrPt7R1YNXzm4EzPpQWOVFBzUvSozyRp2QbOTzhw5T8dMwunaLoKn/vF+WFnqTAZgAMSGoWp6g+4rSJ/7qZ2eMsXGx/EbX1m1RzLYRo6lECEM2bjG7Y8g/s2VyD2fPTlb9bCZhDri7E3uILIp2Jzh9+fRgHPy43OtCvhY6ANoGL4BqbWrD+T++g+YIOXCKYwcolKV9zQm37eTTBbs9A04XH0HrxU6O7OAKQVuL3Tz/xPjIXZuMsI73klP3Z7Q70IZNuIGXb2weZiQWU8OQq5i+g5ejodGPnrv248aGX8b2VHD6HUUJBcBhtYzfRc5O+vjbG0WwVS+ubXlETpP6uELIAU/tiolt3fES6QWRxeHNzGBustNIK7Del4aUXjuDY8RrVLMFmU9e2i534+56D+PaTr+KepW/gzLvtmPd1MnPp6h2MnX71phAqGZtK0NW9Aa3tH/drI9mEUczAV326Hqs3HOVY70KbT/w1NscCpIN5/gyXHRVBH3bsOoRZjAVi6h9wXvD69kPY++fTQKETVy3NRnlzDy4yYZLx+XMt5FPsV/htbdvJmeAC3ouShBGLFoAJXhg7cqwaqOpAaUkeTnXKwoER+ORlRFE4aOK1BIXr07HunXLUNa3H2v3ngH3NQEkapi/ORReHz4teCtJD11B/EUT+67da2pJKSy7m9ryEbs8qpDiLqAhtISEXEKAyhH1WfpZsyUIFL/r7IdlkDsRoy3S4uxdr15wAuvwovSMfhZOTUcn40SgNVIltSbGIjzYPiEVL1/VQkdmMU0F09wi+cFEuIDiFPQ9z/eM154G8RPQwyKnKcNuYd2JaXoYJO0eJgpvTqOg+ZTnSWFvP8IGbHaggaD6MyVXS5iSl1B5vQxRFHQMMCXi9PtS1MLNLt8HHYUwkIOehinpPjH7enKGZq0KpCOx43w5Od+RCG5yWvJFAzuSM50CvHoZFOcJhyAX4pCTkF83Tt0cVrISmwfvowYdICEtjXpidGDQ1o1oABtN2uw05LocKWHb15lJgjJ73Me1VEROA2rH0WoIoW14wVxE2Dfxq7j69KINzfb+a54sNm++k3edXxlAECoB4Okc0nh32iQYM3UeUCyQm2nHtrEls4IOdbnDZy5ixkEiNc4LE4T85eXIULG0BDAhmbj7nmmlsYEebt5dWED8IRlEb64exMARFI10tjCY7VsKZLAqWoqUbZQFSPWvGZHzju9PQfLwbeUkU2aiioVAafQnlAZdsAZwCk4YsqAY5QGWmL0eCLVn5vx4FZGwwiswCZfbmSnXi0fvmA83d6qU0vGQ+zE54HY5SQ3nAcBpH0I6+Fa6ZAqNQLY44HGXcE7jJaBImHBJA5MeLFs7Fg09cjZp9HVzp5oqrzOcjG4z03ugv3O1ICYymve7NAiczXOZ22b/i+mBOlPaFahQumb5KLEhxJuGZJ+5m1gBUM7UVVxDriGcJ8j6FNFyMHebBJUMk8hkJFgZW0/OGBqRsjp9YLFyKYgZHqjzSeCTzGE7RsctiuQq+3gruBf6U65RLjA9FMGEkUQKQFip9pd9fM3sa3tr5Te7qnIed7TPIvZpAGGRiXYS0m4LqZDJlHpIcqqyytw/8H6YLkJC05aIG0CNUeXTw4OZL3CJJHC3WMovz/3JuwC5E8aSfcG1C5jcyK4yGrFPhCKKmAKTq7jvnY8PmDjzywF+BBRORyilV1yBzBFFygOBR6yWvtDlRnkiEAqifQDOo9uAkJ006ARHqQxQyKmYrI7HF0h4SmujNahWWJbfvX+StdCirWrMJ/jhsCXmYPvk15je5McELhUG3xvRylpbmlm178eAvdyEpPUElkj7pJ6KkE317ux9fKU7FKz+7l8EmjTuzvWpFyGwWFK0QUUlxIZK4WaKsSeXjZgu5CmEL/L2d6HKf5p2SgGLeZnVwUaMSdY3LSEe0KILgcrQyZ5MhFwVWxO/LuRRWhulTtnIzdfqg4PlxeEFEHiKLMCvLW7LCc8ei6zBl3Xs4w0WNrHQ7WsWWI4pDVNUdQLrTji9z59eZzHR6iBIbvHygtWhPcHHI+tIAClbuCJ9rlOpIAQgvifyykOJr5G8ByjmS/YA7wc+RjwIDvNCNXQa4gNlMmDT38d7ZfRBnuNE5aVEW6mRxo1/xsy1Fr1ygmz+AEAHIjpEIUYnKkJcoXA2rAzQfSVBbnZ7BSb08y0p1AoczjxKRthTOWvlkQTH78FJZNYpI/sTXUJh/PxXnHFLzqjFPgwpAXEC2tCqqz2HlC7uBualq81OwGlyYFovc5AS0pYpfWkJCk28F7GiK/o5xo18JB7BU0s4jQI8CLjylpvwQhbmPI8OwnFgBrx859RhTADIUCgBZH1izdidwvAfTFmdyL5BRWUAZGpWdIRkhTvyrXdbJkTg7M9SHYRSh57G6Ud33tRM4+yQfTufD/LnLI9z7564U44SU4YKXtgMEoIOfHio2vbkXr/7uMGYsmYgKrg+qQsAFBJ7CYbGijsNSuRtPPVuGMw3t2H7kQmhOoRuP7VmA+cgG52zISHsOEzKWUuNzlLlLT/L7AbGSsKXE7z9qFBDNmxsjsqR915KNyL45U632OCW54TDm4zB4up5j83H+AmNeJrb94mtquPR6/TjFX4rIXCLFGZ1vx2dj6BZm0HR76rjB8RED8TzGmaIQUBGMlJEAN3sMCcAc9uTF3g8+we0Pb8LUEieS+IMHWR0ONHF8r5LAwyRpWT4eX1GGZUvmYfKkXJNW6GoyHKoYk5vI4KMJXgpwkyUlAJPhHvr81u3v8rc8G/k+lYe4AqVbkMJfdU3EbdcX44ayGcwSpyJ3ot4Cl29N1kw6ow1+JlNDXU3QEnDHoh8Lzb5PCLVzC2v72x9i977jmFmcw2QmlYcL+bmZPLKQk5NJv5NEI8xepMuEa/+/7iiAPgqAS9vUvp9jt/ykZahfdCiNU+sitLHQwOUWV5QL9GfGBKvqBbDR4IsA3MQaCoICtn/5IgHtj818DuUB4wGsCTryqjOeyJpxdn9FAONM4QPgXrGAASIZZxVXLGCcKXwA3CsWMEAk46ziP3wnyrgPINtbAAAAAElFTkSuQmCC </BINVAL> </PHOTO> </vCard> </iq>

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