dosubot[bot] commented on issue #7836:
URL:
https://github.com/apache/incubator-devlake/issues/7836#issuecomment-2269724729
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To resolve the "unexpected end of JSON input" error when adding more than 31
repositories to an Azure-DevOps connection in DevLake, you need to ensure that
the JSON response is correctly handled and paginated. The provided code
snippets show how the repositories are fetched and processed, but they do not
include pagination handling for the repositories.
You can modify the `listAzuredevopsRepos` function to handle pagination by
adding support for the `ContinuationToken` or similar pagination mechanism
provided by the Azure DevOps API. Here is an example of how you can modify the
function to handle pagination:
```go
func listAzuredevopsRepos(
vsc azuredevops.Client,
orgId, projectId string,
) (
children []dsmodels.DsRemoteApiScopeListEntry[models.AzuredevopsRepo],
err errors.Error) {
args := azuredevops.GetRepositoriesArgs{
OrgId: orgId,
ProjectId: projectId,
}
var allRepos []azuredevops.Repository
for {
repos, continuationToken, err := vsc.GetRepositories(args)
if err != nil {
return nil, err
}
allRepos = append(allRepos, repos...)
if continuationToken == "" {
break
}
args.ContinuationToken = continuationToken
}
for _, v := range allRepos {
if v.IsDisabled {
continue
}
pID := orgId + idSeparator + projectId
repo := models.AzuredevopsRepo{
Id: v.Id,
Type: models.RepositoryTypeADO,
Name: v.Name,
Url: v.Url,
RemoteUrl: v.RemoteUrl,
IsFork: false,
}
repo.ProjectId = projectId
repo.OrganizationId = orgId
children = append(children,
dsmodels.DsRemoteApiScopeListEntry[models.AzuredevopsRepo]{
Type: api.RAS_ENTRY_TYPE_SCOPE,
ParentId: &pID,
Id: v.Id,
Name: v.Name,
FullName: v.Name,
Data: &repo,
})
}
return
}
```
In this modified function, the `GetRepositories` method is assumed to return
a `continuationToken` along with the repositories. The loop continues to fetch
repositories until the `continuationToken` is empty, indicating that there are
no more pages of repositories to fetch. This ensures that all repositories are
retrieved and processed, avoiding the "unexpected end of JSON input" error.
The `GetRepositories` method in the `Client` struct should also be updated
to handle pagination correctly. Here is an example of how you can implement it:
```go
func (c *Client) GetRepositories(args GetRepositoriesArgs) ([]Repository,
string, errors.Error) {
query := url.Values{}
query.Set("api-version", apiVersion)
var data struct {
Repos []Repository `json:"value"`
}
path := fmt.Sprintf("%s/%s/_apis/git/repositories", args.OrgId,
args.ProjectId)
res, err := c.apiClient.Get(path, query, nil)
if err != nil {
return nil, "", err
}
switch res.StatusCode {
case 401:
fallthrough
case 403:
return nil, "", errors.Unauthorized.New("failed to authorize the
'.../_apis/git/repositories' request using the plugin connection")
case 404:
return nil, "", errors.NotFound.New("failed to find requested
resource on '.../_apis/git/repositories'")
default:
}
err = api.UnmarshalResponse(res, &data)
if err != nil {
return nil, "", err
}
continuationToken := res.Header.Get("X-Ms-Continuationtoken")
return data.Repos, continuationToken, nil
}
```
This implementation ensures that the `GetRepositories` method returns a
continuation token, which can be used to fetch the next page of repositories if
available
<sup>[[1]](https://github.com/apache/incubator-devlake/blob/main/backend/plugins/azuredevops_go/api/remote_helper.go)</sup><sup>[[2]](https://github.com/apache/incubator-devlake/blob/main/backend/plugins/azuredevops_go/api/azuredevops/client.go)</sup>.
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