Try to adjust the content length header

codex/rest/api.nim

@@ -103,7 +103,6 @@ proc retrieveCid(
     if manifest.filename.isSome:
       resp.setHeader("Content-Disposition", "attachment; filename=\"" & manifest.filename.get() & "\"")
 
-    resp.setHeader("Content-Length", $manifest.datasetSize.int)
 
     await resp.prepareChunked()
 
@@ -117,6 +116,9 @@ proc retrieveCid(
         break
 
       bytes += buff.len
+
+      resp.setHeader("Content-Length", bytes)
+
       await resp.sendChunk(addr buff[0], buff.len)
     await resp.finish()
     codex_api_downloads.inc()
@@ -590,14 +592,21 @@ proc initPurchasingApi(node: CodexNodeRef, router: var RestRouter) =
       ## tolerance        - allowed number of nodes that can be lost before content is lost
       ## colateral        - requested collateral from hosts when they fill slot
       try:
+        echo "without contracts"
         without contracts =? node.contracts.client:
           return RestApiResponse.error(Http503, "Persistence is not enabled", headers = headers)
+
+        echo "without cid"
 
         without cid =? cid.tryGet.catch, error:
           return RestApiResponse.error(Http400, error.msg, headers = headers)
 
+        echo "body"
+
         let body = await request.getBody()
 
+        echo "without params"
+
         without params =? StorageRequestParams.fromJson(body), error:
           return RestApiResponse.error(Http400, error.msg, headers = headers)
 
@@ -624,6 +633,8 @@ proc initPurchasingApi(node: CodexNodeRef, router: var RestRouter) =
         if expiry <= 0 or expiry >= params.duration:
           return RestApiResponse.error(Http400, "Expiry needs value bigger then zero and smaller then the request's duration", headers = headers)
 
+        echo "request storage"
+
         without purchaseId =? await node.requestStorage(
           cid,
           params.duration,