Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for merging media stream indexes of a media stream are described in this specification. In one aspect, a method includes receiving a first media stream index at a first server system, including a first list of sequentially arranged fragment identifiers corresponding to at least a portion of multiple sequentially arranged fragments. Fragment identifiers that are potentially missing from the first index can be identified. A second media stream index including a second list of sequentially arranged fragment identifiers corresponding to at least a portion of the multiple sequentially arranged fragments can be requested from a second server system. The first and second list of the sequentially arranged fragment identifiers can be compared and the first list of sequentially arranged fragment identifiers can be reconstructed based on the comparison.

Abstract: Exemplary embodiments involve a mediation application executed on a processor determining one or more digital programming insertion breaks in a linear media stream. The linear media stream can include electronic content delivered over a network at a time determined by the content provider. The mediation application can determine that a plurality of clients identified by a common group identifier and in communication with the mediation application are receiving the linear media stream. The mediation application can mediate a plurality of requests for digital programming insertion content provided by a digital programming insertion content provider by identifying digital programming insertion content targeted to the common group identifier. The mediation application can provide the digital programming insertion content during the one or more digital programming insertion breaks to the plurality of clients.

Abstract: Exemplary embodiments involve a mediation application executed on a processor determining one or more digital programming insertion breaks in a linear media stream. The linear media stream can include electronic content delivered over a network at a time determined by the content provider. The mediation application can determine that a plurality of clients identified by a common group identifier and in communication with the mediation application are receiving the linear media stream. The mediation application can mediate a plurality of requests for digital programming insertion content provided by a digital programming insertion content provider by identifying digital programming insertion content targeted to the common group identifier. The mediation application can provide the digital programming insertion content during the one or more digital programming insertion breaks to the plurality of clients.

Abstract: One exemplary embodiment involves receiving a request to access data that corresponds to a placeholder link from a requesting client device. The embodiment further involves identifying a set of recipient attributes associated with the client device. Additionally, the embodiment involves determining a plurality of sponsor links based at least in part on the recipient attributes, wherein the recipient attributes provided targeted alternative content to the client device. Then, the embodiment involves directing the client device as indicated by the identified sponsor links.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for merging media stream indexes of a media stream are described in this specification. In one aspect, a method includes receiving a first media stream index at a first server system, including a first list of sequentially arranged fragment identifiers corresponding to at least a portion of multiple sequentially arranged fragments. Fragment identifiers that are potentially missing from the first index can be identified. A second media stream index including a second list of sequentially arranged fragment identifiers corresponding to at least a portion of the multiple sequentially arranged fragments can be requested from a second server system. The first and second list of the sequentially arranged fragment identifiers can be compared and the first list of sequentially arranged fragment identifiers can be reconstructed based on the comparison.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for allocating server application logic across multiple tiers of a server system are described. In one aspect, a method includes hosting a server application on multiple servers. The servers include an application server deployed in a secure tier of an enterprise network and an edge server deployed in an edge tier of the enterprise network. A primary firewall isolates the secure tier from the edge tier and from a public network. A secondary firewall isolates the edge tier from the public network. The edge server is configured to receive requests for services provided by the server application, to perform a first subset of the services, and to relay a subset of the requests to the application server. The requests received by the edge server are sent from at least one client device through the public network and authenticated by the secondary firewall.