| Interface | Description | 
|---|---|
| SafeContentHeaderGuesser | Computes a safe content type given an existing content type and filename. | 
| Class | Description | 
|---|---|
| AttachmentDownload | |
| AttachmentUrlParser | A URL parser for attachments (including thumbnails). | 
| DefaultAttachmentSafeContentHeaderGuesser | |
| ExportDownload | |
| ServeAfterTransactionDownload | This abstract download strategy allows implementors to gather necessary information from a database and set HTTP
 headers within a database transaction. | 
| SettingsConfiguredDownloadPolicyProvider | Allows to configure the  DownloadPolicyused by Confluence to be selected via
 the global system setting 'attachmentSecurityLevel'. | 
| ThumbnailDownload | 
| Enum | Description | 
|---|---|
| AttachmentSecurityLevel | Represents the different levels at which attachments can be viewed - always downloaded, always displayed inline, or a mix of the two. | 
| DispositionType | Represents the first field of a content-disposition header | 
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