Detect when no previous posts available in Facebook Graph posts edge? - javascript

I'm accessing the Facebook Graph API for posts and am trying to figure out the pagination handling. I understand the use of paging.next and paging.previous properties of the results but I'd like to know when there are actually previous results. Particularly, when I make the first 'posts' call, I get back a paging.previous url even though there are no previous values. Upon calling that url I get a response with no results.
For example, calling "168073773388372/posts?limit=2" returns the following:
{
"data": [
{
"story": "Verticalmotion test added a new photo.",
"created_time": "2015-12-02T17:04:56+0000",
"id": "168073773388372_442952469233833"
},
{
"message": "http://www.youtube.com/watch?v=QD2Rdeo8vuE",
"created_time": "2013-12-16T23:19:30+0000",
"id": "168073773388372_184840215045061"
}
],
"paging": {
"previous": "https://graph.facebook.com/v2.6/168073773388372/posts?limit=2&format=json&since=1449075896&access_token=****&__paging_token=enc_AdA69SApv4VoBZB0PPZA7W5EivCYQal8KMFmRNkyhr8ZBk4w0YmFEQUJWV3JZBS70ihyMpbqieQaERhY50enqNCMBuIZATadeopYj8xPvQL7Y8KueaQZDZD&__previous=1",
"next": "https://graph.facebook.com/v2.6/168073773388372/posts?limit=2&format=json&access_token=****&until=1387235970&__paging_token=enc_AdAVMaUlPmpxjBmq5ZClVdNpFp7f9MyMFWjE7ygqsMLW7zvSx3eGHLkfwDxdCx0uO3ooAZCKDmCwMWHZA9RNyxkYUPJyjMtO3kynKm5uF2PhoPZB2gZDZD"
}
}
How can I tell if it's the first set of results?
From tidbits scattered around the documentation and web, it seems like the previous url shouldn't be there.
I don't think it matters because I get the same results in the Graph Explorer but I'm using OpenFB to access the API.

You can set the order to be reverse then get the 1st result
https://developers.facebook.com/docs/graph-api/using-graph-api
Ordering
You can order certain data sets chronologically. For example you may sort a photo's comments in reverse chronological order using the key reverse_chronological:
GET graph.facebook.com
/{photo-id}?
fields=comments.order(reverse_chronological)
order must be one of the following values:
*chronological*
*reverse_chronological*

Related

How can I retrieve popular users from GitHub?

I am trying to get a list of popular repos and users on GitHub.
Their API has an example to find users given some criteria that must be sent under the q query param, this is a required parameter but I am not sure how to send it as 'empty'
The query should list users and sort by followers, I am close but I am not sure what to send in q
`https://api.github.com/search/users?q=${WHAT_WHOULD_GO_HERE}&sort=followers&order=desc`
Just for reference, I was also trying to get popular repos and this is possible with the following query and it works just fine:
curl https://api.github.com/search/repositories\?q\=stars:\>1+language:javascript\&sort\=stars\&order\=desc\&type\=Repositories
You can run a query by specifying the follower limit, repository language, and page on the Github API. If you can configure the queries correctly, you will get what you want.
Sample query
`https://api.github.com/search/users?q=repos:followers:<1000&language:javascript&page=1&per_page=100`
For example, I can fetch all users with more than 2000 followers. This is also getting a kind of popular users.
`https://api.github.com/search/users?q=repos:followers:%3E2000&language:javascript&page=1&per_page=100`
Response
{
"total_count": 321,
"incomplete_results": false,
"items": [
{
"login": "vim-scripts",
"id": 443562,
"node_id": "MDQ6VXNlcjQ0MzU2Mg==",
"avatar_url": "https://avatars0.githubusercontent.com/u/443562?v=4",
"gravatar_id": "",
"url": "https://api.github.com/users/vim-scripts",
...
}
After fiddling around I got the answer:
curl https://api.github.com/search/users\?q\=followers:\>1000\&page\=1\&per_page\=10\&sort\=followers\&order\=desc
The query is based on Github's own popular list which has some clues in its own URL, the query above returns the exact same result
https://github.com/search?o=desc&q=followers%3A%3E%3D1000&ref=searchresults&s=followers&type=Users
The q query param needs only this:
followers: >1000,
Plus some sorting as described in the question:
sort: by the followers count,
order: descendent

Logic App bypass Null in filter query

I am building a Logic App that uses the Azure Resource connector to obtain a list of my resources. I would then like to filter the results to Microsoft.Compute resources that have a tag name and value of stop and normal.
Here is a snippet of resource that I receive back without any filters
{
"id": "/subscriptions/<subscription>/resourceGroups/Env1/providers/Microsoft.Compute/virtualMachines/MyVM1",
"name": "MyVM1",
"type": "Microsoft.Compute/virtualMachines",
"location": "westeurope",
"tags": {
"stop": "normal"
}
},
{
"id": "/subscriptions/<subscription>/resourceGroups/LogicApp/providers/Microsoft.Logic/workflows/DWSize-Check",
"name": "DWSize-Check",
"type": "Microsoft.Logic/workflows",
"location": "westeurope",
"tags": {}
}
As you can see, the bottom resource does not contain any tags, as with many others that will appear in the list
I use the standard Compose Filter Array connector to try and filter out from the value I receive back.
Here is the code that I wish to use for the filter command:
#and(contains(item()?['id'], '/Microsoft.Compute/virtualMachines/'), contains(item()?['tags'], variables('TagName')), contains(item()?['tags'], variables('TagValue')))
variables('TagName') and variables('TagValue') will be stop and normal, as show in the example tags listed in my results snippet.
However, because there is no tag values listed in other resources, such as Microsoft.Logic/workflows, I receive the following null error:
InvalidTemplate. The execution of template action 'Filter_array'
failed: The evaluation of 'query' action 'where' expression
'#contains(item()?['tags'], variables('TagValue'))' failed: 'The
template language function 'contains' expects its first argument
'collection' to be a dictionary (object), an array or a string. The
provided value is of type 'Null'.'.
Would anyone know how to get around this?
I have tried similar queries to this #contains(item().tags?.stop, variables('TagValue')) just to see if it picks up anything, but I'm still blocked by a null response :(
I tried the above with the help of the Workflow Definition Language, but still no dice. Any help would be greatly appreciated.
EDIT
In addition to the answer posted by Thomas, I have performed the following (image below) to filter out null from the results and get to the TagName, but I am still unable to get to the TagValue, even if I use contains:
#and(contains(item()?['tags'], variables('TagName')), contains(item()?['tags'], variables('TagValue')))
or event just trying to look for TagValue
#contains(item()?['tags'], variables('TagValue'))
You can check for null and return an empty value (an empty array in your case).
You can replace item()?['tags'] with this expression or create a variable :
if(equals(item()?['tags'], null), [], item()?['tags'])

How to display all values of a json?

I'm returning a JSON from the MercadoLivre API. In it I receive the following structure:
{
"seller_id": "239258430",
"query": null,
"paging": {
"total": 6241,
"offset": 0,
"limit": 100
}
I need to get all datas, not the only 100th firsts, I try set limit with my 'total' but that not works. Any Suggestion?
I need record that in my Database.
First of all, the documentation is quite clear if you read it.
Secondly, mercadolibre apis have their own custom developer forum :
Anyway, the answer would be that you need to send offset to get paginated results. Always keep in mind that in searches, your limit can´t be higher than 200. So to get results from 200 to 400, you should add &offset=200&limit=200 to your query

Fetch list of 50,000 most subscribed channels

I'm trying to figure out a way to grab the top 50,000 most subscribed youtube channels using javascript. These only need to be grabbed once and will be stored in a file to be used for an autocomplete input in a webpage.
I've gotten pretty close to getting the first top 50 by using search:list (/youtube/v3/search) by searching with parameters maxResults=50, order=viewCount, part=snippet, type=channel, fields=nextPageToken,items(snippet(channelId,title))
Returning:
{
"nextPageToken": "CDIQAA",
"items": [{
"snippet": {
"channelId": "UC-9-kyTW8ZkZNDHQJ6FgpwQ",
"title": "Music"
}
},{
"snippet": {
"channelId": "UC-lHJZR3Gqxm24_Vd_AJ5Yw",
"title": "PewDiePie"
}
},{
"snippet": {
"channelId": "UCVPYbobPRzz0SjinWekjUBw",
"title": "Анатолий Шарий"
}
},{
"snippet": {
"channelId": "UCam8T03EOFBsNdR0thrFHdQ",
"title": "VEGETTA777"
}
},...
Then all I'd have to do is fetch that 1000 more times using the nextPageToken to get a list of the top 50,000.
Unfortunately, sorting by relevance, rating, viewCount, or nothing is not yielding the 50 most subscribed channels, and there doesn't seem to be any sort of way to order them by subscriber count according to the documentation; so it seems like i am stuck.
Just before you writing your 50 results in file (or database), you can make one more API call, using channelId field from your result, and merge all of them with comma delimited and make another API call Channels: list.
On that page for example you can use following parameters:
(these are IDs from your example above)
part=statistics
id=UC-9-kyTW8ZkZNDHQJ6FgpwQ,UC-lHJZR3Gqxm24_Vd_AJ5Yw,UCVPYbobPRzz0SjinWekjUBw,UCam8T03EOFBsNdR0thrFHdQ`
And result will look something like this:
{
"kind": "youtube#channel",
"etag": "\"m2yskBQFythfE4irbTIeOgYYfBU/MG6zgnd09mqb3nAdyRnPDgFwfkE\"",
"id": "UC-lHJZR3Gqxm24_Vd_AJ5Yw",
"statistics": {
"viewCount": "15194203723",
"commentCount": "289181",
"subscriberCount": "54913094",
"hiddenSubscriberCount": false,
"videoCount": "3175"
}
}
And you can take subscriberCount from result for each channel.
I know, this is not the way to sort your 50 results while writing into the file,
but with this you can sort later your results by "subscriber count" while fetching from file for your autocomplete input.
I didn't find any other way to sort results by subscriber count, so maybe this can be helpful.
The idea to do is to run a server side script, that makes RESTful api calls in a loop, and writes the results to .JSON file, to save results. For that you can create PHP script, that makes REST API call to google, and fetch first 50 results, and then use file write operations to write your results. Run that PHP script as corn job to update results at regular intervals. Executing corn job at every specific time interval you set keeps results fresh.
Hit CURL command with loop for next, to fetches 50 results every time and create temp file with all the results saved in .JSON file. Once your results are fetched, replace your old JSON file with newly created temporary file. This will generate fresh JSON file are regular, with new results if any changes are made to data.
However, the idea to use temporary file is to avoid script avoid wait/slow of AJAX down due to consistent read and write operations on same file. Once temporary file is written, simply use move command to replace the actual file.
Make sure, you use cache control headers in AJAX results to keep its freshness of data.

Azure Graph api user creation - property values specified are invalid

I have a problem with Azure AD Graph API integration where we try to create user to existing Active directory. Used azure documentation to work on this (https://msdn.microsoft.com/en-us/library/azure/ad/graph/api/users-operations#UpdateUser)
For some reason the example dataset is not working, but I'm receiving:
{
"odata.error": {
"code": "Request_BadRequest",
"message": {
"lang": "en",
"value": "One or more property values specified are invalid."
},
"values": null
}
}
The dataset I'm passing is
{
"accountEnabled": true,
"displayName": "Test User",
"mailNickname": "TestUser",
"passwordProfile": {
"password": "Test1234",
"forceChangePasswordNextLogin": false
},
"userPrincipalName": "Test#_MY_DOMAIN_.onmicrosoft.com"
}
_MY_DOMAIN_ is one of the domains defined in the Active directory's domains.
If I try e.g. removing any of the required fields, I'm receiving error which defines the missing property.
Listing and updating users is working just fine, there is some weird issue with adding.
Usually, we will get this issue when we haven't set the Url in the correct format. I tested your dataset on my side, it worked fine. Please double check the url.
Here is the capture of my test request:
Any further concern, please feel free to let me know.
Most probably problem was related to Azure AD permissions. Somehow started suddenly working.
One thing figured out is that the error message above will also come e.g. if you have property key mistyped. Sometimes response describes the missing property, but not always.
Thanks everyone for your time..

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